Um.... Its a theme image and not part of default its held on a created theme so how is this not editable and you have to go to the actual theme and edit it that way... It also does this on the default theme as well.
I'll look into it. It is a logo, and that error might be in place because of the logo wizard. But nonetheless it should either be editable or the edit link should not exist.
(Click to enlarge)
(Click to enlarge)