No. If you contact GLO and initiate the process to get your VLNWSA renewed and provided, you will simply need to run loadlicense once you have the new .XML file provided.
This will not change any existing configuration.
Please contact our Global Licensing Operations team:
Phone: 1-800-553-2447, opt 3 (You may request to have a case opened for GLO/Licensing.)
Their email directly is: firstname.lastname@example.org
Just make sure the same features are present when you get the renewal license. If you get 1 addition feature such as Web Reputation (when you didn't have it before), this can affect the way policies behave.