We don't want to allow adding a prerequisite branch to an existing merge proposal, because adding (or removing, or changing) a prerequisite branch changes the meaning of the merge proposal, and therefore invalidates any reviews or approval that may have been done.
Instead, we want to support using resubmit to change the involved branches. See bug #504369.
We don't want to allow adding a prerequisite branch to an existing merge proposal, because adding (or removing, or changing) a prerequisite branch changes the meaning of the merge proposal, and therefore invalidates any reviews or approval that may have been done.
Instead, we want to support using resubmit to change the involved branches. See bug #504369.