While the Magic: The Gathering Companion app does allow players to input their own match results and verify their accuracy, mistakes may happen. With round rollback, you can fix an error in a match result up to one round after it occurs.
The ability to roll back one round is available. It’s important to note that, once you roll a round back, you cannot undo it. Any pairings or match results from the round you’re rolling back will be gone forever. This ensures data stays accurate in your event but also means you should carefully consider the impact on your players.
Also important: you can only go back one single round. Thankfully, all but a tiny number of errors get caught in the following round. So, rather than add functionality for the corner cases, we’re focusing our development on new, powerful features that help serve your needs in the day-to-day.