Hello,
I have 2 entities Societe and User with Many To Many relationship, so i create 
in the dateBase 3 tables : 
Societe (societe_id,societe_name)
User (user_id,user_name)
SocieteUser (societeUser_id, user_id, societe_id) is the table joining societe 
and user.

when i try to delete user, i have the following exception : 

11:40:24,296 FATAL [application] javax.persistence.EntityNotFoundException: 
deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  | javax.faces.el.EvaluationException: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
  |     at 
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
  |     at javax.faces.component.UICommand.broadcast(UICommand.java:383)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:184)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:162)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:350)
  |     at 
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
  |     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
  |     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
  |     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
com.fitnetapplication.resources.pdf.RendererFilter.doFilter(RendererFilter.java:79)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
  |     at 
org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
  |     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
  |     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  |     at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  |     at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  |     at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
  |     at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  |     at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
  |     at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
  |     at 
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  |     at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  |     at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
  |     at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  |     at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
  |     at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  |     at java.lang.Thread.run(Thread.java:595)
  | Caused by: javax.persistence.EntityNotFoundException: deleted entity passed 
to persist: [com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:613)
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:299)
  |     at 
org.jboss.seam.persistence.EntityManagerProxy.flush(EntityManagerProxy.java:90)
  |     at org.jboss.seam.framework.EntityHome.remove(EntityHome.java:62)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
  |     at 
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
  |     at 
org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.persistence.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:48)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:38)
  |     at org.jboss.seam.util.Work.workInTransaction(Work.java:40)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:32)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91)
  |     at 
com.fitnetapplication.resources.model.UserHome_$$_javassist_55.remove(UserHome_$$_javassist_55.java)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:328)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:341)
  |     at 
org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
  |     at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
  |     at 
org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
  |     at 
com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
  |     ... 49 more
  | 11:40:24,296 WARN  [lifecycle] #{userHome.remove}: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  | javax.faces.FacesException: #{userHome.remove}: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:107)
  |     at javax.faces.component.UICommand.broadcast(UICommand.java:383)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:184)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:162)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:350)
  |     at 
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
  |     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
  |     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
  |     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
com.fitnetapplication.resources.pdf.RendererFilter.doFilter(RendererFilter.java:79)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
  |     at 
org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
  |     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
  |     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  |     at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  |     at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  |     at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
  |     at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  |     at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
  |     at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
  |     at 
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  |     at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  |     at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
  |     at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  |     at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
  |     at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  |     at java.lang.Thread.run(Thread.java:595)
  | Caused by: javax.faces.el.EvaluationException: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
  |     at 
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
  |     ... 48 more
  | Caused by: javax.persistence.EntityNotFoundException: deleted entity passed 
to persist: [com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:613)
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:299)
  |     at 
org.jboss.seam.persistence.EntityManagerProxy.flush(EntityManagerProxy.java:90)
  |     at org.jboss.seam.framework.EntityHome.remove(EntityHome.java:62)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
  |     at 
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
  |     at 
org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.persistence.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:48)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:38)
  |     at org.jboss.seam.util.Work.workInTransaction(Work.java:40)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:32)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91)
  |     at 
com.fitnetapplication.resources.model.UserHome_$$_javassist_55.remove(UserHome_$$_javassist_55.java)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:328)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:341)
  |     at 
org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
  |     at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
  |     at 
org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
  |     at 
com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
  |     ... 49 more
  | 11:40:24,296 WARN  [lifecycle] executePhase(INVOKE_APPLICATION 5,[EMAIL 
PROTECTED]) threw exception
  | javax.faces.FacesException: #{userHome.remove}: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:105)
  |     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
  |     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
  |     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
com.fitnetapplication.resources.pdf.RendererFilter.doFilter(RendererFilter.java:79)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
  |     at 
org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
  |     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
  |     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  |     at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  |     at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  |     at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
  |     at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  |     at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
  |     at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
  |     at 
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  |     at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  |     at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
  |     at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  |     at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
  |     at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  |     at java.lang.Thread.run(Thread.java:595)
  | Caused by: javax.faces.FacesException: #{userHome.remove}: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:107)
  |     at javax.faces.component.UICommand.broadcast(UICommand.java:383)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:184)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:162)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:350)
  |     at 
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
  |     ... 43 more
  | Caused by: javax.faces.el.EvaluationException: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
  |     at 
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
  |     ... 48 more
  | Caused by: javax.persistence.EntityNotFoundException: deleted entity passed 
to persist: [com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:613)
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:299)
  |     at 
org.jboss.seam.persistence.EntityManagerProxy.flush(EntityManagerProxy.java:90)
  |     at org.jboss.seam.framework.EntityHome.remove(EntityHome.java:62)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
  |     at 
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
  |     at 
org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.persistence.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:48)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:38)
  |     at org.jboss.seam.util.Work.workInTransaction(Work.java:40)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:32)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91)
  |     at 
com.fitnetapplication.resources.model.UserHome_$$_javassist_55.remove(UserHome_$$_javassist_55.java)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:328)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:341)
  |     at 
org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
  |     at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
  |     at 
org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
  |     at 
com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
  |     ... 49 more
  | 11:40:24,296 ERROR [ExceptionFilter] handling uncaught exception
  | javax.servlet.ServletException: #{userHome.remove}: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:256)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
com.fitnetapplication.resources.pdf.RendererFilter.doFilter(RendererFilter.java:79)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
  |     at 
org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
  |     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
  |     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  |     at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  |     at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  |     at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
  |     at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  |     at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
  |     at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
  |     at 
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  |     at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  |     at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
  |     at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  |     at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
  |     at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  |     at java.lang.Thread.run(Thread.java:595)
  | Caused by: javax.faces.FacesException: #{userHome.remove}: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:107)
  |     at javax.faces.component.UICommand.broadcast(UICommand.java:383)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:184)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:162)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:350)
  |     at 
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
  |     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
  |     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
  |     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
  |     ... 40 more
  | Caused by: javax.faces.el.EvaluationException: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
  |     at 
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
  |     ... 48 more
  | Caused by: javax.persistence.EntityNotFoundException: deleted entity passed 
to persist: [com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:613)
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:299)
  |     at 
org.jboss.seam.persistence.EntityManagerProxy.flush(EntityManagerProxy.java:90)
  |     at org.jboss.seam.framework.EntityHome.remove(EntityHome.java:62)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
  |     at 
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
  |     at 
org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.persistence.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:48)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:38)
  |     at org.jboss.seam.util.Work.workInTransaction(Work.java:40)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:32)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91)
  |     at 
com.fitnetapplication.resources.model.UserHome_$$_javassist_55.remove(UserHome_$$_javassist_55.java)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:328)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:341)
  |     at 
org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
  |     at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
  |     at 
org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
  |     at 
com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
  |     ... 49 more
  | 11:40:24,312 ERROR [ExceptionFilter] exception root cause
  | javax.faces.FacesException: #{userHome.remove}: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:107)
  |     at javax.faces.component.UICommand.broadcast(UICommand.java:383)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processEvents(AjaxViewRoot.java:184)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:162)
  |     at 
org.ajax4jsf.component.AjaxViewRoot.processApplication(AjaxViewRoot.java:350)
  |     at 
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:97)
  |     at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
  |     at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
  |     at javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
com.fitnetapplication.resources.pdf.RendererFilter.doFilter(RendererFilter.java:79)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
  |     at 
org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:44)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:141)
  |     at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:281)
  |     at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
  |     at 
org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
  |     at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
  |     at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
  |     at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
  |     at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  |     at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
  |     at 
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
  |     at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
  |     at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
  |     at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
  |     at 
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
  |     at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
  |     at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)
  |     at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
  |     at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580)
  |     at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
  |     at java.lang.Thread.run(Thread.java:595)
  | Caused by: javax.faces.el.EvaluationException: 
javax.persistence.EntityNotFoundException: deleted entity passed to persist: 
[com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:91)
  |     at 
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:91)
  |     ... 48 more
  | Caused by: javax.persistence.EntityNotFoundException: deleted entity passed 
to persist: [com.fitnetapplication.resources.model.SocieteUser#<null>]
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:613)
  |     at 
org.hibernate.ejb.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:299)
  |     at 
org.jboss.seam.persistence.EntityManagerProxy.flush(EntityManagerProxy.java:90)
  |     at org.jboss.seam.framework.EntityHome.remove(EntityHome.java:62)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
  |     at 
org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:56)
  |     at 
org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.persistence.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:48)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:38)
  |     at org.jboss.seam.util.Work.workInTransaction(Work.java:40)
  |     at 
org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:32)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:42)
  |     at 
org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
  |     at 
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:106)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
  |     at 
org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:91)
  |     at 
com.fitnetapplication.resources.model.UserHome_$$_javassist_55.remove(UserHome_$$_javassist_55.java)
  |     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  |     at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
  |     at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
  |     at java.lang.reflect.Method.invoke(Method.java:585)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:328)
  |     at 
org.jboss.el.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:341)
  |     at 
org.jboss.el.parser.AstPropertySuffix.invoke(AstPropertySuffix.java:58)
  |     at org.jboss.el.parser.AstValue.invoke(AstValue.java:96)
  |     at 
org.jboss.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:276)
  |     at 
com.sun.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:68)
  |     at 
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:77)
  |     ... 49 more

please help me, because I spent three days without finding the solution.
thx!!!

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