Hello. We are using the accounting module in Odoo 10. We are new to Odoo AND do not have accounting knowledge (bad combination I know). We have made invoicing mistakes and now I need to refund/cancel/undo the invoices with errors.
When I use the "Refund Invoice" button, it responds with and error "The partner has to be the same on all lines for receivable and payable accounts!" and I cannot complete the cancellation. So what I have been doing in the meantime is creating new invoices with negative entries so that the General Ledger still balances.
However now I have a customer that has outstanding invoices and when I tried to create a new invoice with negative amounts (to cancel a previous invoice with errors), Odoo now wants to add outstanding amounts together so I cannot register a payment with these negative values.
I need help cancelling invoices that are unpaid.