Free Package Updates
If you use proxmox for free, you will need to configure proxmox for updates. For this you will install the apt repository for unstable updates.
/etc/apt/sources.list file to add the no-subscription repository as below.
deb http://ftp.nz.debian.org/debian bullseye main contrib deb http://ftp.nz.debian.org/debian bullseye-updates main contrib # security updates deb http://security.debian.org bullseye-security main contrib # PVE pve-no-subscription repository provided by proxmox.com, # NOT recommended for production use deb http://download.proxmox.com/debian/pve bullseye pve-no-subscription
Comment out the line in that file, you should then have.
#deb https://enterprise.proxmox.com/debian/pve bullseye pve-enterprise
> sudo apt-get update && sudo-apt-get dist-upgrade