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via Hibernate JIRA by Kevin Jordan, 1 year ago
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java.lang.NullPointerException: 	at org.hibernate.envers.event.EnversPreCollectionRemoveEventListenerImpl.onPreRemoveCollection(EnversPreCollectionRemoveEventListenerImpl.java:47)	at org.hibernate.action.internal.CollectionRemoveAction.preRemove(CollectionRemoveAction.java:143)	at org.hibernate.action.internal.CollectionRemoveAction.execute(CollectionRemoveAction.java:104)	at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:273)	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:265)	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:188)	at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:323)	at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52)	at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1081)	at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:315)	at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)	at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175)	at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:73)