- If you have existing proxmox installation before, you might getting this error.
- Since proxmox uses logical volume management (lvm), the existing group of pve already been there.
- To solved this problem follow this instructions:
a. Select debug mode on the installer.
b. cd to /sbin
c. lvm lvremove /dev/pve/root
d. lvm lvremote data
e. lvm vgremove pve
Reboot.
Ref : https://superuser.com/questions/1234793/dev-pve-already-exists-on-the-filesystem