This normally happens when you interrupt the install of Ceph:
pveceph install
update available package list
start installation
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
gdisk is already the newest version (1.0.6-1.1).
ceph-common is already the newest version (15.2.15-pve1).
ceph-fuse is already the newest version (15.2.15-pve1).
Some package........
Are you getting this error in Proxmox while trying to apt update or install Ceph?
apt update
Hit:1 http://security.debian.org bullseye-security InRelease
Err:2 https://enterprise.proxmox.com/debian/pve bullseye InRelease
401 Unauthorized [IP: 144.217.225.162 443]
Hit:3 http://ftp.hk.debian.org/debian bullseye InRelease ........
How To Install Ceph
If you stopped an install of Ceph midway you will need to manually restart it with "pveceph install"
Remember that your VM needs to have working internet (gateway) and DNS in order to connect to the apt repo to download all of the packages that Ceph requires.
Remember to repeat these steps for each node that you want Ceph on.
........