Override Policies when changing last name

We have several policies in place when creating a user object.

Now if someone tries to change the lastname of such a user (mostly due to marriage), we get the error that it is not possible to do so due to a conflict with several policies.

Is it possible to override or "disable" those policies during the change of the lastname?

This is due to how our attributes are generated, so for example the UPN is dependent on the first- and the lastname. So changing the lastname would create a conflict with the UPN Creation Policy.

I hope I made myself clear of what I want to accomplish.

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