ottohlc yep incompatibility isues.. like i mentioned before . you need to stay on 5.19 ..
or just du this simples steps .
download the last stable version for 86 and 64.
download the file boot.tar.xz
a file .tar.xz is like a .zip. Just unzip this file on your sdcard/usb key to replace existing files.
Or, starting with batocera.linux 5.19,
from ssh, adapt the url and run : /recalbox/scripts/recalbox-upgrade.sh https://batocera-linux.xorhub.com/upgrades/x86_64/stable/last
This upgrades the system. This doesn't remove any of your data.
Once copied, you'll get 2 files recalbox.img and recalbox.img.update. The latter will replace the first one automatically during the next boot.