Modding Help Fatal Error While Testing Modded Sword

I have never had this happen before; I tested a modded item and it errored, but the game had a fatal error upon exiting. I don't know if this should belong in Starbound modding or support.

Log is attached. If attached log does not work, a pastebin version is available.

If there is a better spot for this, please move this thread and notify me.