SAP Message VK320 - Condition type & is not a rebate condition type

Diagnosis
You have attempted to assign rebate condition type &V1& to conditiontype group &V2&. Condition type group &V2&, however, is only definedfor price agreements (sales promotions, sales quotes, etc.).

System Response
The assignment of a rebate condition type to a condition type group forprice agreements is not allowed.

Procedure
Select a condition type, which is a price or a discount/surcharge.