...
Unpost Customer Receipts one by one.
Delete Customer Receipts
Unpost Sales Invoice to correct the invoice.
Then correct Customer Payments on the Sales Invoice.Or unpost Sales Invoice to correct it.
...
Unpost Customer Receipts one by one.
Delete Customer Receipts
Unpost Sales Invoice to correct the invoice.
Then correct Customer Payments on the Sales Invoice.Or unpost Sales Invoice to correct it.