qm delsnapshot

Delete virtual machine snapshots. More information: https://pve.proxmox.com/pve-docs/qm.1.html.

Delete a snapshot:

qm delsnapshot {{vm_id}} {{snapshot_name}}

Delete a snapshot from a configuration file (even if removing the disk snapshot fails):

qm delsnapshot {{vm_id}} {{snapshot_name}} --force 1