Change in Degree preference

I recently attended a NUS Business Analytics (BZA) interview with the School of Computing and I realized that I prefer BZA over Business Administration (BBA). In my application I indicated BBA as my first choice but I’ve decided that I prefer BZA over BBA. BBA just offered me an interview but I’m afraid that attending the BBA interview would lower my chances for BZA since I indicated BBA as my first choice in the application. What should I do?