Thank you Jakub, I'll try first option and let you know. Unfortunately, it will take time as it implies installing a new system... Cheers AG -----Original Message----- From: Jakub Niedermertl [mailto:jniederm@redhat.com] Sent: Friday, August 19, 2016 00:25 To: Andrea Ghelardi <a.ghelardi@iontrading.com> Cc: users@ovirt.org Subject: Re: [ovirt-users] ovirt 3.5.6: ERROR: duplicate key value violates unique constraint "pk_images" during import Hi Andrea, IIUIC the problem occurs during import VM from external domain. I can see two options to save data on disks: * Export storage domain can be detached and removed from engine. Install new separate engine and try to import VMs into new engine. * Alternative is to use virt-viewer to create a vm and directly attach images form export domain to the vm. The images have standard qcow2 format. Jakub