Not speaking on behalf of Univention, but as customer so Univention certainly has more insight to give:
- If you look up issue #50259 as referenced in the updater message, you can see that this issue is about blocking the update to 4.4-2 via preup.sh.
- This issue references #50261 which is where the actual fix is being worked on.
Both issues are currently in state VERIFIED FIXED, but not CLOSED. I can only imagine that Univention will soon-ish release the update blocker since it seems to have passed internal checks so far. I’d expect them to double-check it this time before re-releasing the upgrade scripts eventually unblocking the way to 4.4-2 before 4.4-1 reaches regular EoL.
Another, earlier thread has already discussed this issue and Univention staff has mentioned that we should check back once the bug has reached the status closed. I recommend reading this other thread the 2 linked issues to get more insight.