SAP Message VT831 - Relevant billing type for manual accrual must be: Rel. to rebate ='D'

Diagnosis Manual accrual order type = order type for manual accrual for a rebaterequest. System Response The relevant billing type, for example B4, for order type, for exampleB4, for manual accrual for a rebate request, must have: Subject tovolume-based rebate 'X' in the billing type field, for example, B4.