Expire images in multiple Tapes just for a specific tape.

hello,

i need your help please,

i have one images that existe in two tapes (Tape A with Media ID : 000018 and the second tape is : 000025), the tapes are in in a same robot, but in different Media volume-Pool.

can i expire the Backup ID on the first tape, without any effect on the backup ID in the second one ??

i'm afraid to expire the Backup ID, and it's will be expire from all the support (it's a very important backup ID, with 1 year of retention).

the master is on : Linux RedHat 6.2.

Netbackup entreprise version 7.6.0.2.

thnaks in advance