Need a way to replace receipts after submission

I just made a reimbursement request and was told that one of my receipts was missing one of the line items. I realized that I should have uploaded the combined PDF I prepared, but instead uploaded just one individual PDF. But now I can't replace the receipt in there, and had to reply to the SPI ticket attaching it there. It would be nice if I could replace the receipt on reimbursements.debian.net so that the record in there is complete.