Fix delete future teams

Signed-off-by: Lixfel <agga-games@gmx.de>

src/de/steamwar/bungeecore/sql/TeamTeilnahme.java

@@ -28,7 +28,7 @@ public class TeamTeilnahme {
 
     private static final Statement insert = new Statement("INSERT INTO TeamTeilnahme (TeamID, EventID) VALUES (?, ?)");
     private static final Statement delete = new Statement("DELETE FROM TeamTeilnahme WHERE TeamID = ? AND EventID = ?");
-    private static final Statement deleteFuture = new Statement("DELETE FROM TeamTeilnahme t WHERE t.TeamID = ? AND (SELECT e.Start FROM Event e WHERE e.EventID = t.EventID) > NOW()");
+    private static final Statement deleteFuture = new Statement("DELETE t FROM TeamTeilnahme t INNER JOIN Event e ON t.EventID = e.EventID WHERE t.TeamID = ? AND e.Start > NOW()");
     private static final Statement byEventTeam = new Statement("SELECT * FROM TeamTeilnahme WHERE TeamID = ? AND EventID = ?");
     private static final Statement byEvent = new Statement("SELECT * FROM TeamTeilnahme WHERE EventID = ?");
     private static final Statement byTeam = new Statement("SELECT * FROM TeamTeilnahme WHERE TeamID = ?");