Payments - matched a payment twice and cant delete either

Payments - matched a payment twice and cant delete either

Just wondering how I can delete a paypal matched payment that I added as a sales manually to the paypal transaction page and then added the payment again on the same clients invoice? This is showing up as a double-up of the same amount in my statement when only I need just the one recorded.... should I add a credit or something to the invoice to take off one payment and write a note or is there another way I can balance it out properly in the software so that I only have one payment recorded for the invoice in question.

thanks