Tape media doen't show in the Restore by Session option

I have a backup session that consist of 10 tapes. I need to restore some folders but the RESTORE BY SESSION options does not show the date of my backup. Probably because it was from a different server and it was from 8 years ago. what can i do so the RESTORE BY SESSION shows my backup session date?
Thanks

have you tried doing a 'merge' of these tapes in order to get detailed information in the restore by session window?