I just got the Aurochs Reels but the League Prize is Three Stars, not Jupiter Sigil. Please don't tell me I have to play 20 games

I don't think my sanity will survive 20 more games of Blitzball.

I can't afford to throw every match because each match is a struggle so I need to make sure my characters continue to level up.

Please tell me the league prize can be reset like the tournament prize.