revertback

Hi, I want to revert back pve updates to previous state, please guide Current Version #pveverison -v proxmox-ve: 5.0-21 (running kernel: 4.10.17-3-pve) pve-manager: 5.0-31 (running version: 5.0-31/27769b1f) pve-kernel-4.10.17-2-pve: 4.10.17-20 pve-kernel-4.10.15-1-pve: 4.10.15-15...