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

@@ -146,6 +146,7 @@ public class Team {
         user.setLeader(false);
         delete.update(teamId);
         teamCache.remove(this);
+        TeamTeilnahme.deleteFuture(teamId);
     }
 
     public List<Integer> getMembers(){

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

@@ -28,6 +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 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 = ?");
@@ -44,6 +45,10 @@ public class TeamTeilnahme {
         return byEventTeam.select(ResultSet::next, teamID, eventID);
     }
 
+    public static void deleteFuture(int teamID) {
+        deleteFuture.update(teamID);
+    }
+
     public static Set<Team> getTeams(int eventID){
         return byEvent.select(rs -> {
             Set<Team> teams = new HashSet<>();