BuddyPress.org

You simply can’t do it, but the old posts should still direct you to their new locations.

Well, I suppose you could change the /blog to / but I’d hate to see what kind of havoc that could cause.

Proceed at your own risk...

Site Admin->Blogs->Edit your main blog



Change "Path" to "/" and "Permalink Structure" to remove "/blog" and see what happens.

My guess is dogs and cats, living together, mass hysteria. :X