Serveur Minecraft moddée crash aléatoire

Bonjour,j'ai un problème avec mon serveur minecraft moddée, je peux me connecter et jouer, mais je ne sais pas pourquoi dés fois sa me kick ou me fais crash avec ça comme erreur dans la console

[02:06:19] [Server thread/WARN]: Failed to handle packet for /
net.minecraft.util.ReportedException: Ticking player
    at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:349) ~[mw.class:?]
    at net.minecraft.network.NetHandlerPlayServer.func_147347_a(NetHandlerPlayServer.java:303) ~[nh.class:?]
    at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(SourceFile:137) ~[jd.class:?]
    at net.minecraft.network.play.client.C03PacketPlayer.func_148833_a(SourceFile:8) ~[jd.class:?]
    at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:212) ~[ej.class:?]
    at net.minecraft.network.NetworkSystem.func_151269_c(NetworkSystem.java:165) [nc.class:?]
    at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:659) [MinecraftServer.class:?]
    at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:334) [lt.class:?]
    at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:547) [MinecraftServer.class:?]
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:427) [MinecraftServer.class:?]
    at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:685) [li.class:?]
Caused by: java.lang.NullPointerException
    at net.aetherteam.aether.containers.inventory.InventoryAccessories.breakItem(InventoryAccessories.java:91) ~[InventoryAccessories.class:?]
    at net.aetherteam.aether.player.abilities.AbilityAccessories.damageItemStackIfWearing(AbilityAccessories.java:57) ~[AbilityAccessories.class:?]
    at net.aetherteam.aether.player.abilities.AbilityAccessories.onUpdate(AbilityAccessories.java:74) ~[AbilityAccessories.class:?]
    at net.aetherteam.aether.player.PlayerAether.onUpdate(PlayerAether.java:288) ~[PlayerAether.class:?]
    at com.gildedgames.util.player.common.PlayerEventHandler.onLivingUpdate(PlayerEventHandler.java:70) ~[PlayerEventHandler.class:?]
    at cpw.mods.fml.common.eventhandler.ASMEventHandler_234_PlayerEventHandler_onLivingUpdate_LivingUpdateEvent.invoke(.dynamic) ~[?:?]
    at cpw.mods.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:54) ~[ASMEventHandler.class:?]
    at cpw.mods.fml.common.eventhandler.EventBus.post(EventBus.java:140) ~[EventBus.class:?]
    at net.minecraftforge.common.ForgeHooks.onLivingUpdate(ForgeHooks.java:287) ~[ForgeHooks.class:?]
    at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1560) ~[sv.class:?]
    at net.minecraft.entity.player.EntityPlayer.func_70071_h_(Unknown Source) ~[yz.class:?]
    at net.minecraft.entity.player.EntityPlayerMP.func_71127_g(EntityPlayerMP.java:295) ~[mw.class:?]

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