Hi Marcos,
I have tried , but the Master Image which is based on Linux server. During the chat with Support team, the engineer tried the below steps as per the link (https://support.eset.com/en/kb6911-cloning-computers-in-eset-security-management-center-create-a-new-computer-every-time), but the option to mark the clone VM as Master image was not present.
Thanks & Regards,
Sekhar Prudhivi