Sorry for my confusion but I was assuming that update and upgrade would involve the shift from debian buster to debian bullseye. This doesn't happen (thank goodness!) I just made a copy of my backup Astroberry 2.0.4 microSD card (fully loaded with platesolving files and equipment data etc) and performed sudo apt update and sudo apt upgrade on the copy. There were 56 packages upgraded but all the revisions of main OS packages were labeled 'oldstable' and the OS stayed with debian buster rather than moving on to bullseye. The upgraded version appears to be fully working.

Read More...