Diagnosis
The use of alternativehistorical data (AHD) for theforecast is active formaterial &SYST-MSGV1& and
plant &SYST-MSGV2&. Whenyou change a material, you cannot maintain the alternative historicaldata (AHD), but only display it.

System Response
The system displays alternative historical data (AHD).

Procedure
To maintain AHD manually, use the appropriate program (transactionWAHD2).