License activation limit reached -- old Mac unavailable

Hello. I am trying to activate my Parallels Desktop license on a new Mac. I don't have access to my old Mac anymore as it was many years ago. Could you please reset/release my license key activations? Thank you.
 
I am facing the same issue when I am trying to instill parallels on new Mac it says listens has reached maximum limit and upgrade or buy license is there any option to deactivate license in old Mac and use in new mac
 
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