Hi,

what is correct way to duplicate the object tree?

Where do you want to duplicate the object tree? If you want it twice in memory, you could just load it with two different sessions.

Or if you want it twice in the database you could
- detach the object (close the session)
- set the id to NULL
- persist the object tree again.

It should now considered a new object by hibernate and get a new ID (assuming it is configured this way)