Use the series’ ID number in the folder name.
Z:\TV\Cauchemar en cuisine (2011) - {tmdb-69021}\
This syntax is documented here: https://support.plex.tv/articles/naming-and-organizing-your-tv-show-files/
This method will only work if this library is already using the new “Plex TV Shows” metadata agent.
But even if you are still on the old, deprecated agent: adding the (year)
to the folder name already helps matching to the correct show.
In some cases you might have to Plex Dance after renaming the folder.