Comment 1 for bug 390431

This bug may be the same as bug #390951, if as the error implies the remote branch is created in format 6 (on top of a stacked repository, presumably), *then* the error happens. In that case the user sees an error and a broken (but superficially ok, so long as you never access data that is only in the stacked-on repository) branch is left on on the remote side.