Do i need to submit new DS 160 if appointment is scheduled for different location?

Could you please provide input for my below situation?

I have submitted DS160 for the Hyderabad location, and unfortunately, I could not get any slot for Hyderabad and booked an appointment for the Chennai location. This is for a dropbox appointment.

a. Do I need to submit a new DS 160 for the Chennai location?
b. Do I need to carry both new and old?
C. which DS 160 I need to submit during my appointment? Do I need to tell you about the old one?

Appreciate any pointers

You should carry the new DS160 with you and tell then about it. They should be able to see both opd and new DS160 in their system.