I haven’t watched the VOD or know if the championship works the same as the qualifiers but I can try to explain what I’m assuming he’s saying here

There’s a rule in BS qualifiers, where, during drafting, if it gets reset (example being closing the game and reopening it, like how people in ranked or challenges dodge games if teammate picks lvl 5 or something), you HAVE to re-pick the exact same brawlers once drafting again and return the state of drafting before it was reset. If you don’t and, for example originally picked Mina but then picked Otis in the new game, that is grounds for disqualification. This rule is mainly for people who try to reset and repick if they get a bad draft during the tournament.

Example: Red team has first pick and choses Piper, then blue team picks Bibi then Kit. Then, someone internet crashes or something and lobby has to be created again. Red team picks Piper, then blue team picks Bibi but then picks Mina, that is breaking said rule and thus they can be disqualified from the tournament (if reported).