java.lang.NullPointerException
	at org.hibernate.action.internal.EntityAction.getId(EntityAction.java:100)
	at org.hibernate.action.internal.EntityDeleteAction.postDelete(EntityDeleteAction.java:149)
	at org.hibernate.action.internal.EntityDeleteAction.execute(EntityDeleteAction.java:122)
	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:604)
	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:478)
	at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:356)
	at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)
	at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1437)
	at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:494)
	at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3259)
	at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2457)
	at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:473)
	at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:178)
	at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$300(JdbcResourceLocalTransactionCoordinatorImpl.java:39)
	at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:271)
	at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:86)