When I run apt update on my Armbian machine (station-p2) I have started getting the following error message:
mark@station-m2:~$ sudo apt update
Hit:2 http://deb.debian.org/debian bullseye InRelease
Hit:3 http://deb.debian.org/debian bullseye-updates InRelease
Hit:4 http://deb.debian.org/debian bullseye-backports InRelease
Hit:5 http://security.debian.org bullseye-security InRelease
Hit:1 http://armbian.chi.auroradev.org/apt bullseye InRelease
Hit:7 http://giteduberger.fr
Running Debian bullseye? This is EOL.
Edit: Aha, yes, that's it.
https://unix.stackexchange.com/questions/669004/zst-compression-not-supported-by-apt-dpkg