Protocol error for my server

[MastersPvPro]

I go to dinnerbone site to check if my server is online-working https://dinnerbone.com/minecraft/tools/status/ but when i look at my server Comand promt it says ...

 

java.io.IOException: Bad packet id 46
2017-07-30 12:30:49 [INFO] [STDERR]     at net.minecraft.network.packet.Packet.func_73272_a(Packet.java:153)
2017-07-30 12:30:49 [INFO] [STDERR]     at net.minecraft.network.TcpConnection.func_74447_i(TcpConnection.java:327)
2017-07-30 12:30:49 [INFO] [STDERR]     at net.minecraft.network.TcpConnection.func_74450_c(TcpConnection.java:547)
2017-07-30 12:30:49 [INFO] [STDERR]     at net.minecraft.network.TcpReaderThread.run(SourceFile:94)

2017-07-30 12:30:49 [INFO] [Minecraft-Server] /54.235.59.78:47875 lost connection
2017-07-30 12:31:18 [INFO] [Minecraft-Server] /127.0.0.1:64784 lost connection

2017-07-30 12:35:40 [INFO] [Minecraft-Server] Disconnecting /54.235.59.78:40321: Protocol error
2017-07-30 12:35:40 [INFO] [Minecraft-Server] /54.235.59.78:40321 lost connection

Edited July 30, 2017 by MastersPvPro