Netbackup - update volume configuration error

We had a tape library that we deleted from Netbackup and then readded it back in.

Unfortuantely we forgot to move the tape media from the library out of it before we did this.

So now when we try to inventory the tape media in the library it will not allow us to update the volume confiuration as it thinks the media is already in it.

Any ideas how to get around this?

Thanks