Hello all,

I have these classes:

class Screen(rdb.Model):
        """Represents the screen"""
        rdb.metadata(metadata)
        rdb.tablename("screens")

        id = Column("id", Integer, primary_key=True)
        title = Column("title", String(100))
        ......

        crm = relationship("CRM", uselist=False, backref="screens")

class CRM(rdb.Model):
        """Represents the CRM Tab"""
        rdb.metadata(metadata)
        rdb.tablename("crms")

        id = Column("id", Integer, ForeignKey("screens.id"),
primary_key=True)
        title = Column("title", String(50))
        contactInformation = relationship("CRMContactInformation",
uselist=False, backref="crms")
        endpointConfiguration = relationship("CRMEndpointConfiguration",
uselist=False, backref="crms")
        location = relationship("CRMLocation", uselist=False, backref="crms")
        slaEvent = relationship("CRMSLAEvent", uselist=False, backref="crms")
        notes = relationship("CRMNote", uselist=True, backref="crms")
        log = relationship("CRMLog", uselist=True, backref="crms")

I get this error when trying to delele a screen object:

session.delete(screen)
AssertionError: Dependency rule tried to blank-out primary key column
'crms.id' on instance '<CRM at 0xa3a7fac>'

Thanks!

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