If your iPhone or iPad has dozens of apps that need unexpected updates, don’t worry: you’re not alone. For some reason, Apple seems to be releasing recently released app updates, resulting in users having to reinstall the latest version of some apps.
Among Verge team, the number of unexpected updates ranged from less than twenty to nearly 100, with updates dating back to the beginning of the month recurring from the depth of the App Store. Of course, your experience will vary depending on how many apps you have and you often update them.
Exactly why these updates are re-released is not clear, though MacRumors notes, it may have something to do with an error that seems to affect apps from iOS 1
It is possible that the reissue of app updates is intended to fix this bug, but that is just a theory. Whatever the problem is, it doesn’t seem to be breaking any app functionality. Just update and move on, a good motto for life in general.