I followed the steps provided by Rasa-LilaM, and they seemed to work. However, I encountered a problem when creating a credit memo. While it does "release" the funds to allow them to be applied to the outstanding invoice, creating a credit memo also "subtracts" that amount from the overall monthly sales figure.

To illustrate with a real example: A customer invoice was issued for $100, but the original payment link was faulty. Therefore, I created a new payment link and sent it to the customer. The customer successfully made the payment using the second link. However, this resulted in duplicate income: an outstanding invoice for $100 and an autogenerated sales receipt for $100.

I followed Rasa-LilaM's solution: I deleted the sales receipt entry from the register, raised a credit memo to release the funds for application to the invoice, and then applied the credit to the invoice. Everything seemed fine, but now I have a credit of -$100 showing up on my sales report.  I can use filters to exclude certain entries, but that isn't effective in all cases, as we sometimes have legitimate credits to report (for example, when a customer returns an item or we need to issue a refund). However, none of these scenarios apply to my customer. What do you suggest I do about this?