Offline Deactivation not functioning

Hello, I need to deactivate one of my licences - xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx  - and then reactivate it on another computer.

The computer for which it is to be deactivated is offline.

I cannot deactivate it offline. There is an error. It asks me to log a support request.

I have also tried to reset the licence - again and error and a request to log a support request

Please advise

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