[BUG] Reassigning Match Winner causes Problems in a tournament tree #357
Description
If you want to reassign a winner in a tournaments match it causes the problem that both teams seem to be set for the round 2 match. This should not be the case. Only one time out of each match can rise up to a round 2 match. (round 1 and round 2 are only symbolic since this can occur in each round/stage of the tournament)
First of all setting another match winner should only be possible if the next round is not played (or started) at that moment. After that this option should be locked
If the round 2 match is not started changing the round 1 winner should result in fully changing the round 2 matchup with the winner of the round 1 match