2016-05-06 11:18:46,936 [job-worker0] ERROR com.mediasol.contract.excel.genericImport.GenericExcelImporter [] - Import fail at row 57, column 10 (Transaction rollbacked of import of that row)!
org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: Event
	at org.hibernate.engine.internal.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:294) ~[?:?]
	at org.hibernate.type.EntityType.getIdentifier(EntityType.java:537) ~[?:?]
	at org.hibernate.type.ManyToOneType.nullSafeSet(ManyToOneType.java:165) ~[?:?]
	at org.hibernate.persister.collection.AbstractCollectionPersister.writeElement(AbstractCollectionPersister.java:899) ~[?:?]
	at org.hibernate.persister.collection.AbstractCollectionPersister.recreate(AbstractCollectionPersister.java:1308) ~[?:?]
	at org.hibernate.action.internal.CollectionUpdateAction.execute(CollectionUpdateAction.java:97) ~[?:?]
	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:463) ~[?:?]
	at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:349) ~[?:?]
	at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:350) ~[?:?]
	at org.hibernate.event.internal.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:67) ~[?:?]
	at org.hibernate.internal.SessionImpl.autoFlushIfRequired(SessionImpl.java:1191) ~[?:?]
	at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1257) ~[?:?]
	at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103) ~[?:?]
	at com.mediasol.contract.excel.genericImport.GenericExcelImporter.importColumns(GenericExcelImporter.java:362) ~[?:?]
	at com.mediasol.contract.excel.genericImport.GenericExcelImporter.access$1(GenericExcelImporter.java:279) ~[?:?]
	at com.mediasol.contract.excel.genericImport.GenericExcelImporter$1.run(GenericExcelImporter.java:218) ~[?:?]
	at com.mediasol.commons.hibernate.session.SessionUtil.run(SessionUtil.java:70) ~[?:?]
	at com.mediasol.contract.excel.genericImport.GenericExcelImporter.importRows(GenericExcelImporter.java:174) ~[?:?]
	at com.mediasol.contract.excel.genericImport.GenericExcelImporter.importFromExcelFile(GenericExcelImporter.java:125) ~[?:?]
	at com.mediasol.contract.excel.jobs.ExcelImportJob.importExcelFile(ExcelImportJob.java:82) ~[?:?]
	at com.mediasol.contract.excel.jobs.AbstractExcelImportJob.runInternal(AbstractExcelImportJob.java:97) ~[?:?]
	at com.mediasol.commons.jobs.AbstractBackendJob.run(AbstractBackendJob.java:67) ~[?:?]
	at com.mediasol.commons.jobs.JobRunnable.run(JobRunnable.java:56) ~[?:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]