some kind of bug

function: SFClearLootDistributions.lua -- file: SFClearLootDistributions.lua line # 5

ERROR: General, 1606265082666> ExceptionLogger.logException> Exception thrown java.lang.RuntimeException: attempted index: items of non-table: null at KahluaThread.tableget line:1690.
ERROR: General, 1606265082666> DebugLogStream.printException> Stack trace:
java.lang.RuntimeException: attempted index: items of non-table: null
	at se.krka.kahlua.vm.KahluaThread.tableget(KahluaThread.java:1690)
	at se.krka.kahlua.vm.KahluaThread.luaMainloop(KahluaThread.java:492)
	at se.krka.kahlua.vm.KahluaThread.call(KahluaThread.java:163)
	at se.krka.kahlua.vm.KahluaThread.pcall(KahluaThread.java:1981)
	at se.krka.kahlua.vm.KahluaThread.pcall(KahluaThread.java:1783)
	at se.krka.kahlua.integration.LuaCaller.pcall(LuaCaller.java:76)
	at se.krka.kahlua.integration.LuaCaller.protectedCall(LuaCaller.java:117)
	at zombie.Lua.LuaManager.RunLua(LuaManager.java:508)
	at zombie.Lua.LuaManager.RunLua(LuaManager.java:462)
	at zombie.Lua.LuaManager.LoadDirBase(LuaManager.java:310)
	at zombie.Lua.LuaManager.LoadDirBase(LuaManager.java:237)
	at zombie.gameStates.GameLoadingState.enter(GameLoadingState.java:88)
	at zombie.gameStates.GameStateMachine.update(GameStateMachine.java:145)
	at zombie.GameWindow.logic(GameWindow.java:282)
	at zombie.core.profiling.AbstractPerformanceProfileProbe.invokeAndMeasure(AbstractPerformanceProfileProbe.java:71)
	at zombie.GameWindow.frameStep(GameWindow.java:719)
	at zombie.GameWindow.run_ez(GameWindow.java:637)
	at zombie.GameWindow.mainThread(GameWindow.java:464)
	at java.lang.Thread.run(Thread.java:745)
LOG  : General, 1606265082670> -----------------------------------------