Avoid posting credit note on completed funds reservation

Hello,

I have flagged "Completed" in the header and on the line items of a funds reservation. And I notice that credit note could still be posted against the funds reservation. Therefore, I would like to avoid credit note posting on the funds reservation when the document is flagged "completed".

I'm working in ECC with Former Budgeting - SAP component SAP_APPL / Release 618 / SP level 10.

Is there a way to block the posting of a credit note referencing a completed funds reservation ? Is it a customizing to put in place? Are there OSS notes which correct this issue?

Thanks a lot for your support,

Kind regards,

Chiachen