My migration did not go so great. I went from 5.0 to 5.1. Post migration deploying new machines failed to associate to the interfaces properly. I also had issues when starting up pre-installed vms asking if they were moved or copied, as if it was a brand new install.
I decided to build a new VDS from scratch with the same portgroup structure as my previous, and then migrating from the old VDS to the new one. That worked.
