!contains

                else if(subcmd.equalsIgnoreCase( "teamspawn" )) //eventset teamspawn
                {

                    ConfigurationSection section = this.getConfig().getConfigurationSection( "root.teamspawn" );
                    String teamspawn = args[1];

                    if(sender.hasPermission("event.set.teamspawn") )
                    {
                        if(!section.contains( teamspawn )) //MR ERROR LINE########################
                        {
                            String world = player.getLocation().getWorld().getName();
                            double x = player.getLocation().getX();
                            double y = player.getLocation().getY();
                            double z = player.getLocation().getZ();
                            double yaw = player.getLocation().getYaw();
                            double pitch = player.getLocation().getPitch();

                            this.getConfig().set("root.teamspawn." + args[1] + "-" + ".world", world);
                            this.getConfig().set("root.teamspawn." + args[1] + "-" + ".x", x);
                            this.getConfig().set("root.teamspawn." + args[1] + "-" +  ".y", y);
                            this.getConfig().set("root.teamspawn." + args[1] + "-" + ".z", z);
                            this.getConfig().set("root.teamspawn." + args[1] + "-" + ".yaw", yaw);
                            this.getConfig().set("root.teamspawn." + args[1] + "-" + ".pitch", pitch);

                            this.saveConfig();

                            player.sendMessage(ChatColor.GOLD + "Teamspawn " + ChatColor.RED + args[1] + ChatColor.GOLD + " set!");
                        }
                        else
                        {
                            player.sendMessage(ChatColor.RED + "That teamspawn already exists!");
                        }
                    }
                    else
                    {
                        player.sendMessage(ChatColor.RED + "You dont have permission");
                    }
                }