fix naming crash

tournaments/models/group_stage.py

@@ -218,7 +218,7 @@ class GroupStageTeam:
         self.set_diff = 0
         self.game_diff = 0
         self.display_set_difference = False
-        if team_registration.playerregistration_set.count() == 0:
+        if team_registration.player_registrations.count() == 0:
             weight = None
         else:
             weight = team_registration.weight

tournaments/models/team_score.py

@@ -113,7 +113,7 @@ class TeamScore(SideStoreModel):
             id = self.team_registration.id
             image = self.team_registration.logo
             is_winner = self.team_registration.id == match.winning_team_id
-            if self.team_registration.playerregistration_set.count() == 0:
+            if self.team_registration.player_registrations.count() == 0:
                 weight = None
             else:
                 weight = self.team_registration.weight

tournaments/models/tournament.py

@@ -1453,7 +1453,7 @@ class TeamItem:
         self.names = team_registration.team_names()
         self.date = team_registration.local_call_date()
         self.registration_date = team_registration.registration_date
-        if team_registration.playerregistration_set.count() == 0:
+        if team_registration.player_registrations.count() == 0:
             weight = None
         else:
             weight = team_registration.weight