I just clicked "Quick Buy" to place an order for a new title that just showed up in pre-pub: Wagner’s Parsifal: An Appreciation in the Light of His Theological Journey. The pre-pub order went through (apparently) but I got a banner across the top of my browser with the error message" You already own 'Wagner’s Parsifal: An Appreciation in the Light of His Theological Journey'." How could that be? It never existed before, and I don't have it in my Library.

Here's the newly created pre-pub order:

I'm mystified by the error message.