Cannot edit tracks in an album even manually

Although the track information was correct as ripped by my Innuos server, the exact track titles disappear on my Roon display. They still show in Edit Track under File (as opposed to Prefer Roon) but I cannot change the generalised Roon version or edit manually. Even clicking File and then SAVE does not change it. The album is an 2CD opera Albeniz’s Merlin. How can I input the precise track information and override Prefer Roon as I have reenable to do with other album track metadata?

Make sure your WORK and PART tags are correct (as you wish) and tell Roon to prefer file as described in:

Or tell Roon to ignore the multi-part compositions for this album (to see the track titles instead):

Thanks. Solved!