Backup valid, but still unrestorable?

Repair isn’t a backup, and it’s also not:

I was wondering if you did that, then I saw that you listed a bunch of things (including those), then the:

What happens? I only find the word “restore” in the first and last lines here. Need some details about it.

is going to need a longer look. There are a few mentions of it in the forum. Most of them are in this topic.

EDIT 1:

I’m losing the chronology, but some history here is:

That reaction puzzles me, but I don’t have all the context. Regardless, available developers have changed. Probably I’ll ask if the current ones can dig in a little further. I might try to as well, but it won’t likely be fast…

EDIT 2:

was probably the change (this developer has left, unfortunately), and the discussion behind it might be at

I’m hoping some of the devs can help to reconstruct what was going on here, and what current situation is.