In Odoo v8, quantity of serial number is not shown. if two of the same serial number exist, one with actual stock attached to it, and another without stock attached to it. Both would still show when assigning the serial number in warehouse delivery. This creates a problem because we wouldn't know which one has stock and which one doesn't. This problem does not exist in Odoo v7. How do i show the serial number quantity in Odoo so that it can be deleted?