How to modify the customer payment after applying it to an invoice?

Hi there,

I recently encountered a question. For example, when this sale order is still a sale order (i.e., not an invoice), I can easily delete or modify the customer payment I apply or match to it.

However, once I invoiced this sale order, I found that I was unable to delete or modify the customer payment.

Does anyone have a solution to the above issue?

Thanks.

Kind regards,

John