just change all your rewarding items to 0 oz or set it in item.xml and its should work for this all those item
local specialQuests = { [2001] = 30015, [2002] = 7248, [2003] = 50090, [2004] = 42361, [2005] = 42371, [2006] = 42381, [2007] = 3097}
and i dont see npc? script