See the below email from USCIS:
“We recently updated the following USCIS form(s):
07/24/2017 12:00 AM EDT
New edition dated 06/13/17. Starting 09/22/2017, we will only accept the 06/13/17 edition. Until then, you can use the 12/23/16 edition.
For more information, please visit our Forms Updates page.”