Visa stamping Dropbox query- US Visa Stamp annotated “Clearance Received” or “Department Authorization”

Today while booking Visa stamping appointment i mistakenly choose Yes to > US Visa Stamp annotatedClearance Received ” or “Department Authorization ” and thereafter am able to book the slot but it booked In person Consular Appointment not dropbox.
Is there any way i can get it correct for drop box option without cancelling the booked slot.
Any input.