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https://issues.apache.org/jira/browse/OFBIZ-5385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13814943#comment-13814943
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Adrian Crum commented on OFBIZ-5385:
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NO NO NO! Do not change immutable code! The GenericEntity is immutable for a
reason. The problem is in the code that is trying to modify an immutable
GenericEntity.
> Purchase order immutable/unchangeable errors when adding variant products
> -------------------------------------------------------------------------
>
> Key: OFBIZ-5385
> URL: https://issues.apache.org/jira/browse/OFBIZ-5385
> Project: OFBiz
> Issue Type: Bug
> Affects Versions: SVN trunk
> Reporter: Christian Carlow
> Attachments: ProductWorker.java.diff
>
>
> This error message is generated when trying to add a variant product to a
> purchase order cart after features have been selected:
> Error calling event: org.ofbiz.webapp.event.EventHandlerException: Problems
> processing event: java.lang.IllegalStateException: This object has been
> flagged as immutable (unchangeable), probably because it came from an Entity
> Engine cache.
> To reproduce:
> 1. Add new feature "Gold" as COLOR Feature Type to Widget Features Category
> 2. Change WG-9943 virtual variant method to "Feature Tree Generation" on the
> product page
> 3. Add new "Gold" feature to WG-9943 on feature page of product app
> 4. Create new purchase order from BigSupplier for WG-9943
> 5. Select the new feature "Gold" as the color
> The error is generated after trying to add the product after all features
> have been selected.
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