Possibly incorrect "Submission is the same as one by another user"

Title "Private Affairs" (1975) {Mrs. Weekley's Lover (#1.6)} https://www.imdb.com/title/tt37799297/reference/

I've submitted a "Cast Complete" and it's been declined as "The item you have submitted is exactly the same as a submission that you or another user have already entered, which is still pending review by our staff." Fair enough.

But I submitted it several days ago 261108-111919-333000 and I'd have thought that if someone else had submitted the same info as me, it would have been processed by now. Normally cast-complete gets processed (and visible on the site) within an hour or so. Is there a fault or do I just need to wait longer?