SAP Message V4006 - The production go-ahead period is longer than the mat.go-ahead period

Diagnosis
You have entered a period for production go-ahead that is larger thanthe period for material go-ahead.

System Response
The system does not allow the entry or generates a warning message.

Procedure
Please correct your entries in production- and material go-ahead. If nocorrection is made, the determined production go-ahead cumulativequantity will be greater than the material go-ahead cumulativequantity.