The instructions include If you have enabled the watchdog in HA, please disable for the initial migration to prevent restarts.
Unfortunately "in HA" is awfully broad! May I ask where to check whether this is enabled?
I searched in settings and found nothing. I did web and forum searches and found various custom attempts at watchdogs, but nothing that seemed standard.
You don’t have to feel alone. I kept thinking watchdog was a system level setting. Your thread and the reply saved the day for me. I immediately felt like and idiot, but at least I wasn’t alone and found an answer.