He observed me updating Debian to testing (i will pin it when the next name is published)
Pin what? The work-in-progress that is currently Debian Testing already has a code name: Trixie. Do you mean you'll switch his apt config from Testing back to Stable once Trixie is released as the new Stable?
Appreciated, will consider this afterwards (when more contributions of Lemmes are done).
I already fixed my post: I pinned him to trixie (I used it subconsciously). I won't attempt a (unsupported) downgrade :- ).
If you mean changing the apt config from trixie back to stable, that will be perfectly safe to do when trixie becomes the new stable. At that point, they will both be the same distro. The advantage of doing this is that you will automatically get the next stable release that eventually replaces trixie.