Generate Matches fails or will not rebuild a round that already has matches.
Cause: Matches already exist for that round. You cannot layer a new schedule on top of an existing one.
Fix: Clear the round first, then generate again—or rebuild from a chosen starting point.
On the Matches tab, tap the admin button.
Select Clear Round, choose the round, and confirm. Clearing deletes all matches and scores in that round and cannot be undone.
Select Generate Matches and confirm the new schedule.
To rebuild from a specific round onward without clearing each round one by one, use Edit Rounds → Regenerate Rounds, choose the starting round, and confirm.