Syllabus add: detached entity passed to persist

Caused by: org.hibernate.PersistentObjectException: detached entity passed to persist: org.sakaiproject.component.app.syllabus.SyllabusDataImpl
	at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:139)
	at org.hibernate.internal.SessionImpl.firePersistOnFlush(SessionImpl.java:838)
	at org.hibernate.internal.SessionImpl.persistOnFlush(SessionImpl.java:831)
	at org.hibernate.engine.spi.CascadingActions$8.cascade(CascadingActions.java:357)
	at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:350)
	at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:293)
	at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:161)
	at org.hibernate.engine.internal.Cascade.cascadeCollectionElements(Cascade.java:379)
	at org.hibernate.engine.internal.Cascade.cascadeCollection(Cascade.java:319)
	at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:296)
	at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:161)
	at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:118)
	at org.hibernate.event.internal.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:167)
	at org.hibernate.event.internal.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:158)
	at org.hibernate.event.internal.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:91)
	at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:55)
	at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1258)
	at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:425)
	at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)
	at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:177)
	at org.springframework.orm.hibernate4.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:584)
	... 46 more