20:49:36 [SEVERE] Could not pass event PLAYER_JOIN to mChat
java.lang.IllegalArgumentException: ºe ºe[Member]ºf  is already assigned as a pl
ayer list name for someone
        at org.bukkit.craftbukkit.entity.CraftPlayer.setPlayerListName(CraftPlay
er.java:155)
        at net.D3GN.MiracleM4n.mChat.MPlayerListener.onPlayerJoin(MPlayerListene
r.java:71)
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.ja
va:260)
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.jav
a:58)
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.j
ava:339)
        at net.minecraft.server.ServerConfigurationManager.c(ServerConfiguration
Manager.java:129)
        at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:113)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:80)
        at net.minecraft.server.Packet1Login.a(SourceFile:59)
        at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:46)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:94)
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:516)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:414)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:457)