How to cancel jobs waiting for a tape

I have Backup Exec 2012 SP3 running on Windows Server 2008 R2 backing up several servers on a D2D2T backup plan with weekly full and daily incremental backups to deduplication store and linked copy jobs to a LTO tape library. Right now, because of problems during the last weekend, the last weekly copies to tape haven't completed yet. Consequently, all the daily copy jobs from last night are sitting with job status "Ready; No inactive devices available". This is inconvenient because it prevents me from looking at those jobs' settings, let alone modify them. Is there a way to cancel these jobs before they get a device?

Thanks,
Tilman