Im getting this error when i hold any item with hand with exception of MM items
[12:21:38 ERROR]: [MythicMobs] [EVENTS] Exception thrown whilst handling event: org.bukkit.event.player.PlayerItemHeldEvent [12:21:38 WARN]: java.lang.NullPointerException: Cannot invoke "Object.hashCode()" because "key" is null [12:21:38 WARN]: at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936) [12:21:38 WARN]: at java.base/java.util.concurrent.ConcurrentHashMap.getOrDefault(ConcurrentHashMap.java:1594) [12:21:38 WARN]: at MythicMobs-5.4.0-SNAPSHOT.jar//io.lumine.mythic.core.items.ItemExecutor.getItem(ItemExecutor.java:149) [12:21:38 WARN]: at MythicCrucible-1.7.0-SNAPSHOT.jar//io.lumine.mythiccrucible.items.updating.ItemUpdateManager.shouldUpdate(ItemUpdateManager.java:129) [12:21:38 WARN]: at MythicCrucible-1.7.0-SNAPSHOT.jar//io.lumine.mythiccrucible.items.updating.ItemUpdateManager.onSwapHands(ItemUpdateManager.java:103) [12:21:38 WARN]: at MythicMobs-5.4.0-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.Delegates$ConsumerToBiConsumerSecond.accept(Delegates.java:144) [12:21:38 WARN]: at MythicMobs-5.4.0-SNAPSHOT.jar//io.lumine.mythic.bukkit.utils.events.functional.single.EventListener.execute(EventListener.java:131) [12:21:38 WARN]: at co.aikar.timings.TimedEventExecutor.execute(TimedEventExecutor.java:81) [12:21:38 WARN]: at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) [12:21:38 WARN]: at io.papermc.paper.plugin.manager.PaperEventManager.callEvent(PaperEventManager.java:54) [12:21:38 WARN]: at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.callEvent(PaperPluginManagerImpl.java:126) [12:21:38 WARN]: at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:615) [12:21:38 WARN]: at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:2236) [12:21:38 WARN]: at net.minecraft.network.protocol.game.PacketPlayInHeldItemSlot.a(PacketPlayInHeldItemSlot.java:24) [12:21:38 WARN]: at net.minecraft.network.protocol.game.PacketPlayInHeldItemSlot.a(PacketPlayInHeldItemSlot.java:10) [12:21:38 WARN]: at net.minecraft.network.protocol.PlayerConnectionUtils.lambda$ensureRunningOnSameThread$0(PlayerConnectionUtils.java:51) [12:21:38 WARN]: at net.minecraft.server.TickTask.run(TickTask.java:18) [12:21:38 WARN]: at net.minecraft.util.thread.IAsyncTaskHandler.d(IAsyncTaskHandler.java:153) [12:21:38 WARN]: at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.d(IAsyncTaskHandlerReentrant.java:24) [12:21:38 WARN]: at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1338) [12:21:38 WARN]: at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:197) [12:21:38 WARN]: at net.minecraft.util.thread.IAsyncTaskHandler.x(IAsyncTaskHandler.java:126) [12:21:38 WARN]: at net.minecraft.server.MinecraftServer.bg(MinecraftServer.java:1315) [12:21:38 WARN]: at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1308) [12:21:38 WARN]: at net.minecraft.util.thread.IAsyncTaskHandler.c(IAsyncTaskHandler.java:136) [12:21:38 WARN]: at net.minecraft.server.MinecraftServer.p_(MinecraftServer.java:1286) [12:21:38 WARN]: at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1174) [12:21:38 WARN]: at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:317) [12:21:38 WARN]: at java.base/java.lang.Thread.run(Thread.java:833)