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Many-To-Many JPA only updating join table on Persist and not on Merge???

 
Burton Rhodes
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This is driving me nuts - can someone tell me why this only inserts an entry in the "join table" when saving a new (persisting), but will not perform an insert when merging an existing object? Please help!

My mapping is as follows:
Contact.java (Excerpt)



And my test code is below:

 
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