I'm reusing some older NetBackup catalog tapes via 
"/usr/openv/netbackup/bin/admincmd/bpbackupdb -v", and got this error:

#####
Subject: BkupDB on - 168 NetBackup Database Backup Status

Host: neon
Date: 02/18/2003 08:00:00

NB database backup to media id A00121 FAILED

Exit status = cannot overwrite media, data on it is protected

NO paths were backed up
#####

Googling didn't give me any clues on this error, or how to fix it.  The 
tape itself is not write protected.  What do I need to do to "unlock" 
this tape?

Thanks,
Wade