Hi @Michael Jackson, what version of CF is the license you're trying to renew for?
To the best of my understanding, Adobe only sells licenses for the most recent version, CF 2021 at this time. If you want to run an older version, you need to buy the latest license, then email support and request a separate license key for the older version you want to actually use. We had to do that when when we stood up new 2018 servers, but 2021 was most recent.
It's odd, but that's the deal, assuming I'm understanding your situation.