Please maintain settlement materials for all conditions

What causes this issue?

The conversion of units and settlement accounting are carried out via
the material master record and the purchasing info record.
In the case of condition records that do not relate to a material but
to a settlement group, for example, a settlement material must
therefore be maintained.

System Response

The rebate arrangement cannot be saved.

How to fix this error?

Maintain the settlement materials.
If necessary, create material master records for which the settlement
levels have been maintained in addition to any necessary unit
conversion factors.

Error message extract from SAP system. Copyright SAP SE.