Hi folks,
recently, we did an upgrade vom S/4H 2021 to the latest 2022 (On-Prem).
While checking if everything is still working as expected, I discovered the following error message while doing the assignment of a software package for extensibility,

- Obviously, this is a bug, because the very same packages used to work before the upgrade. A search among the KBA's and a ticket quickly resolved by SAP brought this KBA into picture: https://launchpad.support.sap.com/#/notes/3263253, though, the message seems the same but not the occurence. In the KBA, the error appears upon setting up S_ATO_SETUP, but for our situation, it is already setted up but let's see, maybe this KBA will solve the issue
- The reason why I am writing this question: What is ABAP Language version "A"? I know 2,3,4,5,X but what about "A", "B" etc.?

Thanks for the support!
Br Aleks