Cannot deactivate license after upgrade to freelance plus 2021

I upgraded from Freelance to Freelance Plus 2021 and activated my laptop, but I forgot to deactivate my old license on my PC. The license on my laptop is not working and I cannot deactivate the old version. Basically I cannot use any computer/license. I get this message: 

 "Deactivation failed. Login for this product key has been restricted. Contact the system administrator for assistance." How can I solve this?

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