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Nyatar's dialog needs some "cleaning"... (error exists in Diamond also)
After having spoken to Nyatar just outside of the Temple of Tyr in Neverwinter, I find myself with some 20 copies of the Transport via Plants and Zoo Key... There's apparently no check if the PC has the items in question, and so the game gives a new item every time the PC chooses "I need the scroll"/"I need the key".