Good morning Tony,
Just to be sure if I understand what you are trying to achieve.
You where running Debian 10 (buster) and want to update to Debian 11 (bullseye) and get your SatNOGS station to this Debian 11 release?
If this is the case, there is no update, you need to reinstall the station.
Update instructions
CAUTION!!! THIS UPDATE IS ONLY AVAILABLE WITH A REFLASH AS IT REQUIRES A DISTRIBUTION UPGRADE (Buster → Bullseye)!
Do not attempt to Update through satnogs-setup; it will render it useless!!!
Let me know if this is indeed the case, then maybe I can help you to make this as smooth as possible.
Jan - PE0SAT