how to erase next tape while active job on queued

hi,

the situation is:

- tape library with 3 partition (daily, weekly, monthly)

- partition daily have 5 slots, weekly 1 lost, monthly 1 slot

- current running backup "daily" on slot 5 and full then status is "queued"

- submitted to erase tape daily on slot 1, and got "ready, no idle devices are available"

- change current backup status to hold schedule, and erase tape still not work

any advice how to erase the tape o able continue backup process?

thanks

asus77x