diff --git a/main.py b/main.py
index 6b42faa..97ef470 100755
--- a/main.py
+++ b/main.py
@@ -113,7 +113,7 @@ def tag(tagged: TaggedPlayer | TaggedPokemon) -> PlayerTag:
 
 
 TEAMS: dict[Player, Player] = {}
-_logged_teams: list[Player] = []
+_logged_teams: set[Player] = set()
 
 
 def team(player: Player) -> Player:
@@ -123,7 +123,7 @@ def team(player: Player) -> Player:
     else:
         if not player in _logged_teams and player:
             LOG.warning(f"missing team mapping for {player}")
-        _logged_teams.append(player)
+        _logged_teams.add(player)
         return player