Parallels license has reached its activation limit

I recently got a new Mac and installed Parallels 19. When attempting to activate it, I used my license key but it says, "This license has reached its activation limit and can no longer be used to activate new product copies." I've moved my license from my MacBook to my iMac without issue before, it would ask me if I wanted to disable the license on the old computer and activate it on the current computer. That prompt does not show up this time, instead saying I can't activate my license. I do not have access to my old iMac. What do I do?
Could you please reset my activation key ? (ending with -KJFJ5H)