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How to solve VM is Locked (backup) (500)

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Proxmox. ERROR: VM is locked (backup) (500)

Sometime customer wants to reboot their VM but unable due to OR Manual Proxmox backup process gets stuck, it impossible to make any changes to VM. You will get following error “VM is locked (backup) (500)”

In order to solve this issue, simply run this command in the proxmox SSH.

To unlock KVM VM

qm unlock <VM ID>

To unlock LXC VM

pct unlock <VM ID>