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Stack trace

  • java.util.ConcurrentModificationException: null at java.util.ArrayList$Itr.checkForComodification( at java.util.ArrayList$ at org.hibernate.engine.spi.ActionQueue.executeActions( at org.hibernate.engine.spi.ActionQueue.executeActions( at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions( at org.hibernate.event.internal.DefaultFlushEventListener.onFlush( at org.hibernate.internal.SessionImpl.flush( at org.hibernate.internal.SessionImpl.managedFlush( at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit( at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(

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