CUBASE PRO 11 - NON-UPGRADEABLE
If your Cubase 11 license name has changed into “non-upgradeable”, there is nothing to worry about. Actually, the update has been successful. It just means that the Cubase 11 license has been used to validate your eligibility to update to Cubase 12 and that it cannot be used to update to Cubase 12 again. You will still be able to use this license to open Cubase 11 and previous versions as usual.