If a media is offline, we should be able to retire the media and/or move it to any library. Currently, we have a media which is causing me problems but neither the drive, library, nor Veeam has determined the tape to be bad, so once we remove the media from the library, we should be able to manually retire the media so that it is never used again. Also, we have media which has a location of "Offline", and we want to be able to move it to a specific vault, but that option is not available (it is greyed out).
Not sure whether it will work, but have you tried to move this tape to Retired Media Pool or to different Vault via Move-VBRTapeMedium cmdlet? Thanks.