when the server is shut down

[13:05:34] [Netty Server IO #3/WARN]: A task raised an exception. Task: tk.hugo4715.tinyprotocol.handler.tinyprotocol.TinyProtocol$7@38f9a451
java.util.NoSuchElementException: tiny-KnockbackPlusPlus-1
	at io.netty.channel.DefaultChannelPipeline.getContextOrDie(DefaultChannelPipeline.java:1080) ~[spigot-1.12.1.jar:git-Spigot-65e8124-79e55b6]
	at io.netty.channel.DefaultChannelPipeline.remove(DefaultChannelPipeline.java:434) ~[spigot-1.12.1.jar:git-Spigot-65e8124-79e55b6]
	at tk.hugo4715.tinyprotocol.handler.tinyprotocol.TinyProtocol$7.run(TinyProtocol.java:436) ~[?:?]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) [spigot-1.12.1.jar:git-Spigot-65e8124-79e55b6]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403) [spigot-1.12.1.jar:git-Spigot-65e8124-79e55b6]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:462) [spigot-1.12.1.jar:git-Spigot-65e8124-79e55b6]
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [spigot-1.12.1.jar:git-Spigot-65e8124-79e55b6]
	at java.lang.Thread.run(Unknown Source) [?:1.8.0_144]