Hello

This happens when there are multiple payments for the invoice and you dont cancel payments from newest to oldest. Go to supplier analysis window, find the invoice in ledger items and see payment per invoice/prepayment. 

Cancel mixed payment/offsets from newest to oldest. Then you should be able to cancel it.

Hope this helps

I suspect that the payment you are going to cancel has created payment in advance or payment on account, and this payment has been subsequently used in another payment/offset. 

You have to rollback this subsequent payment first.

Hello Gumabs and Adam,

Thanks a lot for your help!

So, the error “Invoice S-POA xxxxxxx cannot be cancelled because it is in state Paid” was related with the offset.

Solution:

When this error message appears we need to use these points of menu:

1. Query – Supplier payments per invoice / Pre-Payment

       We will use this one to see what’s the S-OFF payment ID to do it’s rollback.

2. Supplier payment rollback 

       RMB and we have two options: rollback complete payment or rollback partial payment
       

At this point, we should be able to cancel our mixed payment.

Thanks a lot,

Kind regards,

Ana