Positive M.

Please let me what to do while approaching Visa Process if one has multiple I-20s. I am in this situation because one of my uni gave me a deadline of Jan 15 to pay the deposit and has issued me an I-20. Now, I have admit from a better school and have applied for their I-20. Do I need to tell my new university that I have already issued I-20 from a previous university? Please guide me.