dep composed on 2023-03-10 03:11 (UTC):
I would like to continue to upgrade uneventfully. I just don't want to get it from Ubuntu
Now I get it. Are you limited by having only one PC, which must be up 24/7, and no time at all for experimentation? If not, and unless it has been reported impossible, I'd clone the current *buntu to another disk and/or PC, and try upgrading from Ubuntu to Debian (without which *buntu would not exist). I might even try one just for fun if no one here knows of reports suggesting it too difficult or impossible. *buntu has some things that differ, and plenty of embellishments, but they are probably unnecessary to your working system, or any Debian system, which apt* probably would report no longer needed and removable.