-Not necessary. You can file both concurrently and mail it to this address:
USCIS Chicago Lockbox
For U.S. Postal Service:
USCIS
P.O. Box 805887
Chicago, IL 60680-4120
For Express mail and courier deliveries:
USCIS
FBAS
131 South Dearborn-3rd Floor
Chicago, IL 60603-5517