@grischa your server is actually running on the current dev, someone made a mistake and released a new Friendica package for Yunohost based on some development status. There is now a discussion what to do about it, I think the version you're on is a bit buggy, but you'll probably have to wait till they release the stable version in December or so. Make sure if a new package in Yunohost shows up that it is not a stable version older than 12.2022 (the soon to be released one)!