SAP Message CACSAC1008 - Error while creating fulfillment level periods for item &3

Diagnosis
Field FFL_BEGIN to select the first or last fulfillment level period isnot filled for settlement schedule item &SYST-MSGV1&,sequence ID &SYST-MSGV2&, item &SYST-MSGV3&.

Procedure
Enter the date for the selection of the first or last fulfillment levelperiod in the field (FFL_BEGIN).