Can’t change release date of the movie

We filmed a short film, and while creating its IMDb page we mistakenly listed 2025 as the release date. However, the film has not been released anywhere and hasn’t even had a screening yet.

This is starting to become a serious issue, because festivals care about the release date shown on IMDb. We tried to change it using the available option, but the request was declined twice due to a lack of evidence.

What kind of evidence are we supposed to provide to prove that the film hasn’t been released anywhere? IMDb already states “type of release unknown” on the page.

If anyone has dealt with a similar issue or knows how to resolve this, I’d really appreciate your advice.