in this case you can use "bplabel" with appropriate options.
>From: "Shingal, Anit (MED, TCS, GEMS-IT)" <Anit.Shingal AT med.ge DOT com>
>To: veritas-bu AT mailman.eng.auburn DOT edu
>Date: Mon, 3 Mar 2003 08:41:31 -0600
>Subject: [Veritas-bu] How to re-use a Netbackup Catalog tape for normal backups
>How can i re-use a tape which was earlier used to backup Netbackup
>Catalog, for normal backups ? I've tried de-assigning it by command line
>and putting it in a different volume pool, but still netbackup is
>somehow able to recognize the tape as a catalog backup tape and freezes
>Any ideas/suggestions would help.