Diagnosis
V1 is a by-product of v2. in the derivation events"Release Process/Production Order" and "Goods Receipt forProcess/Production Order" you cannot derive to a by-product. You canderive to a co-product at any derivation event.

System Response
You can maintain the condition records, however there is no chance of acorrect derivation, or derivation may only be correct in certaincircumstances.

Procedure
If possible, select a different derivation event if you want to deriveto a by-product.