Please don’t deactivate or remove UCS repositories.
UCS repositories are cumulative for the whole of UCS 4, meaning that in 4.4-2-errata are only differences to 4.4-2 errata0. But if you want to install a package that was released with 4.3-4 and has not been updated since, you won’t find it in 4.4* and installation will fail!
Unfortunately that creates long update times, because so many repositories have to be checked, but that’s just how it is.
I have looked on a system (current version. Here it looks like this:
here nothing manual has been disabled or removed. Nevertheless, some are “disabled”. Is that correct? Then I can enter these settings on my server - where I removed these repos - again.