Can't remove old and irrelevant poster

Good day,

Our film "The Cakemaker" has an old poster as the primary image, that we can't replace with the right, updated and official poster created by the producer and owner of the film.

We get the message: "The existing primary has been provided by a studio partner and is not editable."

The current primary image is an old poster, which was placed by one of the distributors, not by a studio, not by the producers. The film has 26 distributors.

The film is:

https://www.imdb.com/title/tt4830786/fullcredits

The image which SHOULD appear on the main IMDB page is:

https://www.imdb.com/title/tt4830786/mediaviewer/rm1194193153?ref_=ttmi_mi_all_pos_48

Please advise or help, this is an old film but is still being viewed and looked at, and the current main image is damaging the title.

Thank you,

Ofir Raul Graizer, Co-Producer, Laila Films