How the Code Object of EF block can be different if the versions are the same in the Types Library Manager?

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Issue:
When you open an archive project with a recent version of Control Expert using option "update with latest version available"
Then in the Types Library Manager, you compare Project with Library, the library version and project version are the same but it is writing “Code Object Different”.
In Control Expert, we have made an internal change inside the system services provided by the PLC. This generated a code for few EFs slightly different.
There are no consequences on the operation of these EFs.

Product Line:
Control Expert v14.1 and v15

Environment:
Types Library Manager

Resolution:
We have decided to not change the version of the EFs. We share a list with all the EFS concerned in the attachment file.