Deacivation Studio 2021

I have reinstalled the Studio 2021 because it was always showing an Index issue. Now, I can not use my licence because it says it is already in use

I asked for a deactivation offline and received a code by email, but when I try to use it this message appears> An error has occurred with your offline-deactivation. If you continue to have problems, please Please log a support request.

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