CraftTweaker 1.8.9-3.0.6 reload error

[14:54:37] [Server thread/INFO]: An unknown error occurred while attempting to perform this command
[14:54:37] [Server thread/WARN]: Couldn't process command: 'mt reload'
java.lang.ArrayIndexOutOfBoundsException: -1
	at java.util.ArrayList.elementData(ArrayList.java:418) ~[?:1.8.0_77-Debian]
	at java.util.ArrayList.get(ArrayList.java:431) ~[?:1.8.0_77-Debian]
	at minetweaker.mc18.oredict.MCOreDictEntry$ActionAddItem.undo(MCOreDictEntry.java:248) ~[MCOreDictEntry$ActionAddItem.class:?]
	at minetweaker.runtime.MTTweaker.rollback(MTTweaker.java:88) ~[MTTweaker.class:?]
	at minetweaker.MineTweakerImplementationAPI.reload(MineTweakerImplementationAPI.java:645) ~[MineTweakerImplementationAPI.class:?]
	at minetweaker.MineTweakerImplementationAPI$1.execute(MineTweakerImplementationAPI.java:74) ~[MineTweakerImplementationAPI$1.class:?]
	at minetweaker.MineTweakerImplementationAPI$19.execute(MineTweakerImplementationAPI.java:667) ~[MineTweakerImplementationAPI$19.class:?]
	at minetweaker.mc18.server.MCServer$MCCommand.func_71515_b(MCServer.java:134) ~[MCServer$MCCommand.class:?]
	at net.minecraft.command.CommandHandler.func_175786_a(CommandHandler.java:100) [j.class:?]
	at net.minecraft.command.CommandHandler.func_71556_a(CommandHandler.java:79) [j.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71333_ah(DedicatedServer.java:380) [ko.class:?]
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:345) [ko.class:?]
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:605) [MinecraftServer.class:?]
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:481) [MinecraftServer.class:?]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_77-Debian]