reinstall a cluster with backup informations

Hi all, we would create a new cluster and would remove our old cluster (reinstall). we have only found a information/tutorial to reinstall a node here https://pve.proxmox.com/wiki/Proxmox_VE_2.0_Cluster , but not for a complete cluster.

do you have informations about reinstall a cluster with backup and restore of all informations about users, configurations, vms, nodes ...

very thanks and best regards