Regarding Sevis Number?

Hello all, I got I-20 for fall 2015 and I have paid the SEVIS fee for that university and booked a visa slot, but due to some reasons I’am not able to attend the visa interview. Now I received a fresh I-20 from same university and I’am going to visa interview with newly received I-20 in next month. The main doubt is does my SEVIS number change from last I-20 to the newly received I-20. If so, what I have to do before going to Interview?.Please reply .Thanks in advance.