As an Administrator you can re-fetch all serverfields of all submissions in a specific call, this will update said fields to their new value. Keep in mind, this change can't be undone.
1. Go to Calls, and select the desired call
2. Click Settings from the top bar
3. Scroll down to locate Refetch Serverfields for all submissions and click Re-Fetch
4. From the pop-up confirmation window, click Re-Fetch Serverfields
5. Additionally, an email notification will be sent once the update has been completed