Gravisuite Reloaded Error

[Client thread/ERROR] [FML]: Unable to determine registrant mod for com.estebes.gravisuitereloaded.item.tool.ItemToolTheChopper@62af0bf2. This is a critical error and should be impossible
java.lang.Throwable
	at cpw.mods.fml.common.eventhandler.EventBus.register(EventBus.java:55) [EventBus.class:?]
	at com.estebes.gravisuitereloaded.item.tool.ItemToolTheChopper.<init>(ItemToolTheChopper.java:35) [ItemToolTheChopper.class:?]
	at com.estebes.gravisuitereloaded.init.ItemInit.<clinit>(ItemInit.java:23) [ItemInit.class:?]
	at java.lang.Class.forName0(Native Method) [?:1.8.0_66]
	at java.lang.Class.forName(Unknown Source) [?:1.8.0_66]
	at cpw.mods.fml.common.registry.ObjectHolderRegistry.scanTarget(ObjectHolderRegistry.java:70) [ObjectHolderRegistry.class:?]
	at cpw.mods.fml.common.registry.ObjectHolderRegistry.findObjectHolders(ObjectHolderRegistry.java:39) [ObjectHolderRegistry.class:?]
	at cpw.mods.fml.common.Loader.preinitializeMods(Loader.java:554) [Loader.class:?]
	at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:243) [FMLClientHandler.class:?]
	at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:480) [bao.class:?]
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:878) [bao.class:?]
	at net.minecraft.client.main.Main.main(SourceFile:148) [Main.class:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_66]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_66]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_66]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_66]
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) [launchwrapper-1.12.jar:?]
	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.12.jar:?]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_66]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_66]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.8.0_66]
	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.8.0_66]
	at org.multimc.onesix.OneSixLauncher.launchWithMainClass(OneSixLauncher.java:310) [NewLaunch.jar:?]
	at org.multimc.onesix.OneSixLauncher.launch(OneSixLauncher.java:394) [NewLaunch.jar:?]
	at org.multimc.EntryPoint.listen(EntryPoint.java:170) [NewLaunch.jar:?]
	at org.multimc.EntryPoint.main(EntryPoint.java:54) [NewLaunch.jar:?]