fix register bug

tournaments/models/tournament.py

@@ -2081,7 +2081,7 @@ class Tournament(BaseModel):
         if player_club_code is None and len(player_club_code) > 0:
             return False
         club_code = self.event.club.code
-        if club_code is None and len(club_code) > 0:
+        if club_code is not None and len(club_code) > 0:
             return False
         player_club_code = player_club_code.replace(" ", "")
         club_code = club_code.replace(" ", "")