SAP Message V1296 - You have already set date &2 for delivery group &1

Diagnosis You have entered more than one delivery date for delivery group &V1&. System Response The system informs you that only one date is possible. The date validat the moment is &V2&. Procedure If you want to take the new date, confirm the message by pressing ENTERafter returning from this help screen. If you want to take the originaldate, delete the entry and then press ENTER.