Reassign Owner / moving virtual disk between VMs not supported

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In Proxmox, go to any VM with al most one ZFS over iSCSI configured disk. Select the disk, and choose Disk Action -> Reassign Owner option from the menu. In Target Guest, select any other VM (stopped or running, doesn't matter), select an appropiate Bus/Device and clic on Reassign Disk button. After the Please wait... message, the following error is displayed:

Storage does not support moving of this disk to another VM (500)

Regards!