Thanks everyone for posting back. Migrations can be a humbling experience. Just when you think you have seen it all, something new pops up. As noted above, this was my first Avalara migration and this message knocked me off my game a bit. I proceeded with the migration which was uneventful. But as a precaution, I reinstalled the Avalara enhancements before verifying the migrated data. In hindsight (always 20/20) I made a mountain out of a molehill. I installed Avalara after installing PU 1 so I think @ThereseLogeais was spot on! You don't have to reinstall Avalara again after the initial migration. All the data appeared, all of the panels were there. Life is much better and client is a couple steps closer to going live in v2016.