I answer to myself in order to help someonelse... The only way I found to do so is to query the engine database on the 'images' table: select * from images where imagestatus = '2'; update images set imagestatus = 1 where image_guid='a1b67bd0-687b-4efa-9221-4f9942edcbd8'; If there are no other processes that justify those disks to be locked (Manipulate with high caution!!!!) update images set imagestatus = 1 where imagestatus = '2'; Right now, the disks are unlocked into the UI and it is possible to safely delete them one by one. Le 26/01/2023 à 22:15, Nathanaël Blanchet via Users a écrit :