Stacktrace
```
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1469)
at java.util.HashMap$EntryIterator.next(HashMap.java:1503)
at java.util.HashMap$EntryIterator.next(HashMap.java:1501)
at jp.ngt.rtm.modelpack.state.DataMap.writeToNBT(DataMap.java:64)
at jp.ngt.rtm.modelpack.state.ResourceState.writeToNBT(ResourceState.java(modified by fixrtm):46)
at jp.ngt.rtm.network.PacketSelectResource.(PacketSelectResource.java:28)
at jp.ngt.rtm.gui.GuiSelectModel.func_146284_a(GuiSelectModel.java(modified by fixrtm):251)
at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:443)
at jp.ngt.ngtlib.gui.GuiScreenCustom.func_73864_a(GuiScreenCustom.java(modified by fixrtm):73)
at jp.ngt.rtm.gui.GuiSelectModel.func_73864_a(GuiSelectModel.java(modified by fixrtm):224)
at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:533)
at jp.ngt.rtm.gui.GuiSelectModel.func_146274_d(GuiSelectModel.java(modified by fixrtm):288)
at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:501)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1759)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1098)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398)
at net.minecraft.client.main.Main.main(SourceFile:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
```
詳細は未確認 発生時のスタックトレースは以下
Stacktrace
``` java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1469) at java.util.HashMap$EntryIterator.next(HashMap.java:1503) at java.util.HashMap$EntryIterator.next(HashMap.java:1501) at jp.ngt.rtm.modelpack.state.DataMap.writeToNBT(DataMap.java:64) at jp.ngt.rtm.modelpack.state.ResourceState.writeToNBT(ResourceState.java(modified by fixrtm):46) at jp.ngt.rtm.network.PacketSelectResource.