[Problem] Konsola i Błędy

[Weloura]

Heyka, o co chodzi z Tymi błędami? Mam się nimi martwić? Podczas normalnego użytkowania z serwera:...

 

[17:45:02] [Server thread/ERROR]: Could not pass event PlayerLevelChangeEvent to Levels v1.5
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:294) ~inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at org.bukkit.craftbukkit.v1_7_R3.event.CraftEventFactory.callPlayerLevelChangeEvent(CraftEventFactory.java:572) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.EntityPlayer.i(EntityPlayer.java:294) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.PlayerConnection.a(PlayerConnection.java:343) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.PacketPlayInFlying.a(SourceFile:137) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.PacketPlayInPositionLook.handle(SourceFile:20) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.NetworkManager.a(NetworkManager.java:157) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.ServerConnection.c(SourceFile:134) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.MinecraftServer.v(MinecraftServer.java:667) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.DedicatedServer.v(DedicatedServer.java:260) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.MinecraftServer.u(MinecraftServer.java:558) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.MinecraftServer.run(MinecraftServer.java:469) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    at net.minecraft.server.v1_7_R3.ThreadServerApplication.run(SourceFile:628) inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -7
    at java.lang.String.substring(String.java:1875) ~[?:1.7.0_65]
    at me.blume987.levels.levelsPlayerEvent.onPlayerLevelChange(levelsPlayerEvent.java:39) ~[?:?]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_65]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[?:1.7.0_65]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.7.0_65]
    at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_65]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:292) ~inecraft_server.jar:git-Bukkit-1.7.9-R0.2-11-g3fd9db2-b3098jnks]
    ... 15 more

[Qwant1]

Musisz wyrzucić plugin Levels.

[Weloura]

Dlaczego? Normalnie cały czas działa. I nie mam z nim problemów w grze. Da się to jakoś sfixować? albo ktos ma inny w miare fajny odpowiednik?