Create a copy of virtual machine on QEMU/KVM Virtual Machine Manager. More information: https://pve.proxmox.com/pve-docs/qm.1.html.
qm copy vm_id new_vm_id
qm copy vm_id new_vm_id --name name
qm copy vm_id new_vm_id --description description
qm copy vm_id new_vm_id --full
--full
):qm copy vm_id new_vm_id --full --format qcow2|raw|vmdk
qm copy vm_id new_vm_id --pool pool_name