Delete duplicate credits

I've tried to delete 4 duplicate credits multiple times, but I'm allways rejected with the following statement:

"Reason: Unable to verify.

Your contribution has been declined.We have been unable to verify your contribution.Unfortunately, we were unable to accept your submission as we were unable to verify the information provided."

I have the same credit in both location management and production management, and I'm trying to delete the ones in production management. I've even attached photos of the same credit, if they're unable to enter the page, but it keeps getting rejected.

These are all my submissions (the last one contains all 4):

#220220-231006-093000