root@pve://# apt updatePlease post theapt update
output, you probably do not have the correct repositories configured.
Hit:1 http://security.debian.org/debian-security bullseye-security InRelease
Hit:2 http://download.proxmox.com/debian/pve bullseye InRelease
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
1 package can be upgraded. Run 'apt list --upgradable' to see it.