Switch Repository to non-enterprise

The enterprise repository requires a bought key, hence the usage of Proxmox in a homelab usually lead to the usage of the non-production repository. 
 
 
 Comment out everything with "#" in /etc/apt/sources.list/pve-enterprise.list 
 
 
 create new file in /etc/apt/sources.list/pve-no-enterprise.list 
 
 
 insert: 
 deb http://download.proxmox.com/debian/pve buster pve-no-subscription 
 
 
 replace "buster" with name of debian version corresponding to Proxmox version. 
 
 
 Sources 
 https://pve.proxmox.com/wiki/Package_Repositories