I have a 2019 Datacenter Licensed Hyper-V host with a 2016 Standard VM on it. I am unable to do an in place upgrade of the 2016 VM using 2019 setup with the AVMA keys located here:
https://docs.microsoft.com/en-us/windows-server/get-started-19/vm-activation-19
I get the error: "This key doesnt work with this edition on windows. Try a different key"
The 2016 VM is currently activated with an AVMA key.
You cannot click 'next' without a valid key.