Comment 3 for bug 513201

Well, what does it mean for branches? It's a bit of a vague concept. I agree. I'm not sure if we should allow it -- I should have emphasized in my first comment that I was being very paranoid on this point when I wrote the db patch.

I think the most likely situation where we might want to allow this is when the details of how the source packages are arranged changes. like a library being refactored out of an application or something. But I certainly haven't thought about it that hard.