emby keeps generating thumbnail for TV Shows Library folder of shows deleted months ago

[ramansgdeep 3]

The home screen of the web interface has a My Media section which lists various Library folders and one of them is TV Shows. Each folder has a thumbnail collage image of the random 4 items in it. The generated collage for TV Shows folder on my device are of shows that have been deleted months ago, and since then the computer has been restarted several times, emby has been shut down and restarted several times, the library has been manually refreshed several times, the thumbnail image has been manually deleted from the options quite a few times. Deleting the image, just regenerates another version of it with other deleted shows. How do i fix this?