Facing error like: a different object with the same identifier value was already associated with the session?

This error message occurs when you are trying to save an object in a Hibernate (a Java persistence framework) session, but another object with the same identifier value already exists in the session. This can happen if you are trying to save an object with an identifier that is already being used by another object that is already associated with the session.

To fix this error, you will need to ensure that you are not trying to save an object with an identifier that is already being used by another object in the session. This can be done by checking the current objects in the session before saving a new object, or by using a different identifier for the new object. You may also need to flush and clear the session to remove any existing objects with the same identifier.