1.14.4 Error: Asynchronous player tracker clear!

Hey,
I'm doing a plugin where only the people who are in a Discord channel see each other, but when I do a channel joine the error occurs

Error:

Code (Text):

[16:23:01] [JDA MainWS-ReadThread/WARN]: [JDA MainWS-ReadThread] ERROR JDA - One of the EventListeners had an uncaught exception
[16:23:01] [JDA MainWS-ReadThread/WARN]: java.lang.IllegalStateException: Asynchronous player tracker clear!
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at org.spigotmc.AsyncCatcher.catchOp(AsyncCatcher.java:14)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.minecraft.server.v1_14_R1.PlayerChunkMap$EntityTracker.clear(PlayerChunkMap.java:1205)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at org.bukkit.craftbukkit.v1_14_R1.entity.CraftPlayer.hidePlayer0(CraftPlayer.java:1047)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at org.bukkit.craftbukkit.v1_14_R1.entity.CraftPlayer.hidePlayer(CraftPlayer.java:1015)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at de.elias177.discordvanish.listener.discord.ChannelJoin.onGuildVoiceJoin(ChannelJoin.java:44)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.api.hooks.ListenerAdapter.onEvent(ListenerAdapter.java:567)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.api.hooks.InterfacedEventManager.handle(InterfacedEventManager.java:96)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.internal.hooks.EventManagerProxy.handle(EventManagerProxy.java:64)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.internal.JDAImpl.handleEvent(JDAImpl.java:152)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.internal.handle.VoiceStateUpdateHandler.handleGuildVoiceState(VoiceStateUpdateHandler.java:133)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.internal.handle.VoiceStateUpdateHandler.handleInternally(VoiceStateUpdateHandler.java:50)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.internal.handle.SocketHandler.handle(SocketHandler.java:37)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.internal.requests.WebSocketClient.onDispatch(WebSocketClient.java:843)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.internal.requests.WebSocketClient.onEvent(WebSocketClient.java:739)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.internal.requests.WebSocketClient.handleEvent(WebSocketClient.java:718)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at net.dv8tion.jda.internal.requests.WebSocketClient.onBinaryMessage(WebSocketClient.java:881)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at com.neovisionaries.ws.client.ListenerManager.callOnBinaryMessage(ListenerManager.java:385)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at com.neovisionaries.ws.client.ReadingThread.callOnBinaryMessage(ReadingThread.java:276)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at com.neovisionaries.ws.client.ReadingThread.handleBinaryFrame(ReadingThread.java:996)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at com.neovisionaries.ws.client.ReadingThread.handleFrame(ReadingThread.java:755)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at com.neovisionaries.ws.client.ReadingThread.main(ReadingThread.java:108)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at com.neovisionaries.ws.client.ReadingThread.runMain(ReadingThread.java:64)
[16:23:01] [JDA MainWS-ReadThread/WARN]:        at com.neovisionaries.ws.client.WebSocketThread.run(WebSocketThread.java:45)

Code:

Code (Java):

    @Override
    public void onGuildVoiceJoin(GuildVoiceJoinEvent e) {
       
        Member user = e.getMember();
        if(ConnectDatabase.playerExistsDiscordID(user.getId())) {
            String uuid = ConnectDatabase.getUUID(user.getId());
            String name = ConnectDatabase.getName(uuid);
            if(ConnectDatabase.getStatus(uuid).equals("CONNECTED")) {

                List<Member> member = e.getVoiceState().getChannel().getMembers();

                if(!Var.inChannel.contains(name)) {
                    Var.inChannel.add(name);
                }

                Player p = Bukkit.getPlayer(name);

                if(p == null) {
                    return;
                }
               
                p.sendMessage("Right");
               
                for(Player all : Bukkit.getOnlinePlayers()) {
                    if(all != p) {
                        p.hidePlayer(all);
                        all.hidePlayer(p);
                       
                        if(ConnectDatabase.playerExists(all.getUniqueId().toString())) {
   
                            Member tar = Main.getInstance().getJDA().getGuildById(Var.serverID).getMemberById(ConnectDatabase.getDiscordID(all.getUniqueId().toString()));
   
                            if(member.contains(tar)) {
                                p.showPlayer(all);
                                all.showPlayer(p);
                            }
                           
                        }else {
                            Bukkit.getOnlinePlayers().forEach(all2 -> {
                                all2.hidePlayer(p);
                            });
                        }
                        System.err.println(all.getName());
                    }
                }
               
            }
           
        }
       
       
    }

 

okay how can i make it in sync?

 

Thank you very much, it is now possible with a BukkitRunnable