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A detached entity results from:

• transaction commit if a transaction-scoped container-managed entity manager is used
• from transaction rollback
• from detaching the entity from the persistence context;
• from clearing the persistence context;
• from closing an entity manager;
• or from serializing an entity or otherwise passing an entity by value—e.g., to a separate application tier, through a remote interface, etc.

The inverse of detached is managed ??

The state of detached entity instances is no longer guaranteed to be synchronized with the database state.

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