Different object with the same identifier value was already

[fabboco]

Hi,

I am still posting about this issue since I am not able to define if it's a bug or a mistake.

I am planning to use EJB3 in a project in the near future, but probably I have to go back to EJB2.x.

MasterManager managerMaster = (MasterManager) myUtils.getBean("masterdetail.manager.interfaces.MasterManagerRemote");

Master master = managerMaster.find((Long) myForm.get("id"));

UserTransaction ut = myUtils.getTransaction();
ut.begin();

List<masterdetail.entity.Detail> getDetails_Details = master.getDetails();

masterdetail.manager.interfaces.DetailManagerRemote managerDetail = (masterdetail.manager.interfaces.DetailManagerRemote) myUtils.getBean("masterdetail.manager.interfaces.DetailManagerRemote");

for (masterdetail.entity.Detail Detail : getDetails_Details)
{
 Detail.setMaster(null);
 managerDetail.merge(Detail);
}

managerMaster.remove(master);

if (ut.getStatus() == Status.STATUS_ACTIVE)
 ut.commit();

@Stateless
public class MasterManagerBean implements MasterManagerRemote, MasterManagerLocal
{
 @PersistenceContext
 private EntityManager manager;
......
 public void remove(Master MasterVariable)
 {
 manager.remove(MasterVariable);
 }
}

When I try to delete the Master bean (id = 21) I get the following error:

javax.ejb.EJBTransactionRolledbackException: null; CausedByException is: a different object with the same identifier value was already associated with the session: [masterdetail.entity.Master#21] at
....
....

Please help !

Ciao

Fabrizio