Can be used in conjunction with BahnCard 25,德铁上买票

Overview of your Booking requestYour travel detailsOutward journeyStation/StopDateTimeProductsReservation request München Hbf
Heidelberg HbfSa, 12.09.201515:47
18:44EC 112No seat reservation requiredYour selections，后面有这句话，请问是不是要和这个BahnCard 25一起才能买？Your ticketOne-Way Ticket, 3 adults, 2nd class, München - Heidelberg
Sparpreis Aktion
Specific train(s) i.e. your ticket is only valid on the train(s) specified on your ticket. Can be used in conjunction with BahnCard 25. Exchange/refund, EUR 17,50; Excluded from the 1st day of validity.39,00 EURTotal price39,00 EUR