how to disable magicwall in a specifik area!! rep++

local combat = createCombatObject()
setCombatParam(combat, COMBAT_PARAM_DISTANCEEFFECT, CONST_ANI_ENERGY)
 
function onCastSpell(cid, var)
	local pos = variantToPosition(var)
	if getTileInfo(getThingPos(cid)).protection or getTileInfo(pos).protection then
		return not doPlayerSendDefaultCancel(cid, RETURNVALUE_ACTIONNOTPERMITTEDINPROTECTIONZONE)
	end

	local v = getTileItemByType(pos, ITEM_TYPE_MAGICFIELD).uid
	if v ~= 0 then
		doRemoveItem(v)
	end

	v = doCreateItemEx(1497)
	if doTileAddItemEx(pos, v) == 1 and getTileItemByType(pos, ITEM_TYPE_MAGICFIELD).uid ~= 0 then
		doDecayItem(v)
		return doCombat(cid, combat, var)
	else
		return not doPlayerSendDefaultCancel(cid, RETURNVALUE_NOTENOUGHROOM)
	end
end