Deactivation does not work

Hi, 

I have Trados 2017 installed on my old PC which is overheating therefore I would like to

deactivate the license there and activate it on a new PC. I followed the instructions but 

when I click Deactivate on my old PC an error is reposted. What should I do?

I have already installed another version on a new PC. 

The error: "Deactivation failed. Could not revoke this license. Revocation is either complete or revolution proof is already uploaded. "

Thank you