In the build-up to the Run, we will often make changes and create new releases of the App. If you get this message it means that a new version of the app is available. You will need to download this for the day.
This message can sometimes appear even though there isn't a newer version. This is because we are in the process of making a release and it's just going through final checks with Apple/Google. You don't need to worry about the app until the day before the Run. At this point, we won't be making any more changes.