Hi,
I am salvaging a broken system, I'm copying and deleting the thin volumes manually as I determine they are no longer needed.
Some are on a disk no longer in the system.
I could delete VMs with missing thin volumes, however I just discovered this behaviour is inconsistent when trying to delete LXC containers.
When you try that it gives as error as follows.

Destroy CT destroy command should work even if the volume is no longer present
I am salvaging a broken system, I'm copying and deleting the thin volumes manually as I determine they are no longer needed.
Some are on a disk no longer in the system.
I could delete VMs with missing thin volumes, however I just discovered this behaviour is inconsistent when trying to delete LXC containers.
When you try that it gives as error as follows.

Destroy CT destroy command should work even if the volume is no longer present
Code:
root@proxmox2:~# pct destroy 1075
storage 'local-14tb-lvm' is not available on node 'proxmox2'
root@proxmox2:~# find /etc/ | grep 1075
/etc/pve/nodes/proxmox2/lxc/1075.conf
root@proxmox2:~# cat /etc/pve/nodes/proxmox2/lxc/1075.conf
arch: amd64
cmode: shell
cores: 4
features: nesting=1
hostname: mail
memory: 2000
net0: name=eth0,bridge=vmbr0,firewall=0,hwaddr=DE:AD:BE:EF:79:55,ip=dhcp,ip6=manual,type=veth
ostype: debian
rootfs: local-14tb-lvm:vm-1075-disk-0,size=16G
swap: 512
unprivileged: 1
root@proxmox2:~#