Migration Tool Database Table?
mg2wpforo is part of the migration tool. It is used to track the migration of old topics/posts id to the new topics/posts id used by wpforo.
We kept ours for record keeping for now. Until they have completed the quotes migration part of the plugin. That is the only thing holding up our 100% complete migration from bbpress to wpforo. Once we have that we can safely migrate from bbpress to wpforo. Soon we hope.