I suggest that you Export the Media in slot 6, then, use Import, not Import Catalog
Import does a more complete job of importing the catalog. Also, Import messages include the session being Imported
Immediately after doing the Import, make a note of the session ID that was imported, go to the Internal Database context of the GUI. Expand Sessions, find the session that was imported, right-click on the session ID, and pick Change Data Protection. Set it to Permanent until your Restore is done,
Do NOT import close to 12 noon, when the Daily Maintenance runs. This looks for unprotected sessions, and, if any are found, the catalogs are deleted to save disk space. Make sure that the media is reprotected before 12 noon