SAP Message AJ579 - The gross price and net price have different zones in price group &4

Diagnosis
In billing document &v1& the gross price/document line item
V2 has no document line item to process the net elements of thisgross price. The above gross price is a block price. Therefore, all netelements of this gross price must also be block prices. Each price ofthe gross group must have the same block. The only difference betweenthe above gross price and the net price/document line item
V3 is the price block.

System Response
INCLUDE ISU_VERARB OBJECT DOKU ID TX

Procedure
Check the blocks of these prices.
If the problem persists, contact SAP. Include the following data inyour message:
Billing document,,&v1&
Gross group,,&v4&
Gross price/document line item,,&v2&
Net price/document line item,,&v3&