I try to access the same object in the database twice in the same session. But I get the following exception. Is there any way to avoid this error but still be able to access the object twice ?

[14:44:54] [ERROR] com.test.testing.core.storage.HibernateTransaction -
general exception - a different object with the same identifier value was
already associated with the session: 4028fb06fc026d8100fc026dde0a02d9, of
class:

please show your code

Huh, the code is VERY large, and probably you would not understand it.
And probably not have the time to understand.

Maybe it helps, if I tell you that I am querying the database twice before using the saveOrUpdate-method in the API, and it is when calling that method I get the errormessage.

do you have a session.disconnect or close before the second query?

Do not ever post here until you have simplified your code and isolated the problem.

Come back when you have an ultra-simple test case.