`ueberzugpp` is described as `Drop in replacement for ueberzug written in C++`. The AUR package that was here before moving to extra therefore was using the `provides` clause to have it satisfy the `ueberzug` dependency. I don't know why, but that clause got removed when `ueberzugpp` was moved to `extra`. For people like me who used `ueberzugpp` to replace`ueberzug` (which wasn't maintained anymore back then) that means we can't upgrade `ueberzugpp` if some of our packages depends on `ueberzug` as it breaks dependencies without that clause. Until `ueberzugpp` cease to be a drop-in replacement, we should be able to use it as if it was `ueberzug` (unless maybe, not that developpment on `ueberzug` have resumed, it's not on-par with it anymore). I can submit a MR if wanted (I was just surprised when going into that section that it offers me to send an email, so I don't know if forks are preferred, emails and so on).