new cleaning tape - Backup Exec still thinks it's the old tape

My old cleaning tape expired. I removed it and inserted a new cleaning tape. Backup Exec seems to think the old tape is still in the slot. It still shows the old allocated date (March), still shows it's been used 50 times, etc. If I try to run a cleaning job it says "job failed with error: expired cleaning media."

1) I've tried to scan the slot, but that doesn't work.

2) I've seen advice saying "mark the slot as NOT cleaning media and run an inventory." However, when I mark it as not cleaning media, the option to inventory is still greyed out.

Any suggestions?