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java.lang.NullPointerException at org.hibernate.envers.event.EnversPostUpdateEventListenerImpl.postUpdateDBState(EnversPostUpdateEventListenerImpl.java:86) at org.hibernate.envers.event.EnversPostUpdateEventListenerImpl.onPostUpdate(EnversPostUpdateEventListenerImpl.java:53) at org.hibernate.action.internal.EntityUpdateAction.postUpdate(EntityUpdateAction.java:255) at org.hibernate.action.internal.EntityUpdateAction.execute(EntityUpdateAction.java:212) at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:362) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:354) at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:276) at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:326) at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52) at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1214) at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:403) at org.hibernate.engine.transaction.synchronization.internal.SynchronizationCallbackCoordinatorImpl.beforeCompletion(SynchronizationCallbackCoordinatorImpl.java:104) at org.hibernate.engine.transaction.synchronization.internal.RegisteredSynchronization.beforeCompletion(RegisteredSynchronization.java:53)