I ran into a problem on my final migration, the largest one at around 360GB. I followed the process above, but must have made a mistake along the way as I got this message:
After a little bit of searching in the Forum I found this part way down a thread: Possible to relink an existing backup store (for pre-seeding purposes) So it appears that i’m not alone.
I’m about to give the siffested fix a try and will report back on my success or failure.