Netbackup 3.4 on Solaris 8...

I have about a dozen active volumes that are not being utilized.   I had an 
occassion recently where the robot contents and the media database got out of 
sync before a backup kicked off.  Netbackup went through the list of active 
volumes until it found one in the correct slot and used it.  Now all the active 
volumes that it passed over are stale.  Does anyone know how to refresh the 
database so the stale volumes get used?

-Neil