IN AEPS ISO to XML, for Reversal Request CustRef & OrgRRN must be same or different?

IN AEPS ISO to XML, for Reversal Request CustRef & OrgRRN must be same or different?

The value of CustRef in Reversal request can be same or different from the value of CustRef in Original Request.
However, the value of OrgRRN in Reversal request must be same as the value of CustRef in Original Request.