Edit: We were updating at the same time…
The TVDB/TMDB IDs really help with reboots, spinoffs, etc. You can also add IMDB/TMDB IDs for movie files. The docs have the details. Be sure and use curly brackets, {…}.
Name and organize the shows as shown in the thread I linked.
Add the TVDB/TMDB ID to the folder name for each show, then Plex Dance both shows, returning them to the Plex library one at a time.
See Plex Documentation → Your Media → Naming & Organizing Your TV Show Files for additional details.
