I can't activate my Parallels Desktop 16 version

Hi,

I have keys from version 11, 12, 13, 14, none of these keys solve the problem of activating version 16

The previous activation key was not accepted by the license server.
Make sure you entered the key correctly. The activation keys are stored in your Parallels account. If you don't want to deal with multiple activation keys and upgrade procedures in the future, we recommend that you subscribe to Parallels Desktop.