sybok
I know that you have installed pseudo-antiX-19 already.
The step 3) of my previous post had *upgrade* in mind, i.e. changing repositories, essentially change ‘stable’ or ‘buster’ (currently Debian old-stable) to ‘bullseye’ (currently Debian stable) in all files in ‘/etc/apt/sources.list.d/’ and then run ‘sudo apt update && sudo apt dist-upgrade’.
Explore the proposed solution (packages to update/upgrade/remove/install) and if reasonable, proceed with the update.
A post by @marcelocripe contains output of the ‘inxi -Fxz’ command and it confirms that the repositories point to ‘buster’, see
http://www.antixforum.com/forums/topic/how-to-use-antix-on-computers-with-a-motherboard-with-sis-or-via-chipset/#post-45699