Poster image accidentally uploaded as publicity image, attempts to re-upload or correct have been rejected

Hello,

I accidentally added an image for an episode of my web-series as a publicity image instead of a poster, and as such now it cannot be used as the episode's primary image. I tried re-uploading it as a poster, but the contribution was declined. I assume because it is an image already in the gallery. I tried deleting the title link to the incorrectly categorized 'publicity' image with the note that I intended to re-upload it correctly, but a couple days later that was also declined. 
Searching for how to correct a mis-tagged image leads me to sparse and inconsistent leads, so I'm asking here so that I can go about it the correct way!

This is the listing: https://www.imdb.com/title/tt50062001
The only image in the photo section is the one I'm trying to replace in the correct poster category.

Thank you for any assistance or suggestions,
H.M.