Subsequent Debits for Purchase Orders

Hello,

When an Subsequent Debit is about to be posted, SAP checks if an invoice has been posted for the current item, an if has not been posted, an error message is displayed.

I want, when an Subsequent Debit is about to be canceled, the same check will be done. In other words, the canceation of Subsequent Debits cannot be done if the invoice hasn't canceled. By now, users can cancel Subsequent Debits, althought the invoice is not canceled.

Is there any customization, or i have to use exit/badi ?

Thanks in advance!