Import of a diskimage for a vm

Hej, i have added a diskimage manual to the base image directory, added to the vm via resources>disk-images. The system starts and i can youse it, but the create-image option is not working, i have this error:

An image cannot be created from this system : Root filesystem in /etc/fstab is mounted from UUID=7f90484e-9e1b-477b-a242-64fb1025f679, not a real device path. This will cause systems created from the image to use incorrect device paths