Continuing the discussion from:
Prioritize matching by Original Broadcast Date not working
Incorrect series year matching
I have the same problem with reboots like Will & Grace in particular, but with other complications.
You will need to use the advanced conversion overrides to add rule that forces shows with that name (Titans) to the TVDB Show ID. I assume you are not also recording shows from the earlier series as well.
Can you attach your conversion log so we can replicate it for our tests