SAP Message C6051 - Goods movement not possible (Order &1 is a kit-to-stock order)

Diagnosis
Order &V1& is a kit-to-stock order. Goods movements for kit-to-stockorders can only be posted via the deliveries generated at the time oforder release.

System Response
The posting of the goods movements will be terminated.

Procedure
Enter the goods movements for the order via the deliveries generated.