Lua Spell bugged

[ApocalypseOT]

I have a spell that gives me the error
frost trap.luancast spell
frost trap.lua:2: attempt to index'global' traps_exhaust' <a nil value>
stack traceback frost trap.lua:2: in fuction

Heres the script

function onCastSpell(cid, var)
	if(traps_exhaust[getPlayerGUID(cid)] == nil) or (traps_exhaust[getPlayerGUID(cid)] < os.time()) then
		traps_exhaust[getPlayerGUID(cid)] = os.time() + 15
		local uid = doCreateItemEx(2579)
		doTileAddItemEx(getCreaturePosition(cid), uid)
		doItemSetAttribute(uid, "name", "Slow Trap")
		doItemSetAttribute(uid, "aid", 54641)
		addEvent(removeTrap, 15 * 1000, getCreaturePosition(cid))
		return true
	else
		doPlayerSendCancel(cid, "You can create only one new trap every 15 seconds.")
		doSendMagicEffect(getCreaturePosition(cid), CONST_ME_POFF)
		return false
	end
end

 

[ApocalypseOT]

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