Sales document type & not defined or faulty

What causes this issue?

Sales document type &V1& does not exist in the system or is not allowed
for "subsequent settlement" (end-of-period volume rebate settlement).
Document type &V1& is assigned to arrangement type &V2& ("subsequent
settlement") for partial or final settlement.
The exact source of the error is described in a message issued for a
previously processed rebate arrangement.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

&WHAT_TO_DO& (system administrator)
IF &DEVICE&='SCREEN'
<DS:SIMG.SIMG_CFMENUOLSDVOV8>Define sales document types</>
<DS:SIMG.SIMG_CFMENUOLMEOMHD>Define arrangement types for subsequent
settlement</>
ENDIF

Error message extract from SAP system. Copyright SAP SE.