1. Check your Proxmox version
pveversion
2. Disable the enterprise repository
Proxmox VE 7 & 8
Edit:
nano /etc/apt/sources.list.d/pve-enterprise.list
Comment the line:
# deb https://enterprise.proxmox.com/debian/pve bookworm enterprise
(On Proxmox 7, replace
bookworm with bullseye depending on your system.)
Proxmox VE 9
Edit:
nano /etc/apt/sources.list.d/pve-enterprise.sources
Comment the entire block:
# Types: deb # URIs: https://enterprise.proxmox.com/debian/pve # Suites: bookworm # Components: pve-enterprise
3. Enable the no-subscription repository
Proxmox VE 7 & 8
Edit:
nano /etc/apt/sources.list
Add:
deb http://download.proxmox.com/debian/pve bookworm pve-no-subscription
(On Proxmox 7, replace bookworm with bullseye depending on your system.)
Proxmox VE 9
Edit:
nano /etc/apt/sources.list.d/pve-no-subscription.list
Add this block:
Types: deb URIs: http://download.proxmox.com/debian/pve Suites: trixie Components: pve-no-subscription Architectures: amd64
4. Update package lists
apt update