Sometimes if you do not properly delete objects in a Grails/GORM/Hibernate transaction the following error might occur:

deleted object would be re-saved by cascade (remove deleted object from associations)

This message is presented by the org.hibernate.ObjectDeletedException

After some hours of investigation I found a solution to find the cause!

Just place a breakpoint in Hibernates `` before the exception is thrown.

There you might lookup the connected objekt in the parentsByChild HashMap of the persistenceContext.

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