So in my online shop I have only 1 piece per a product and people can only buy them with offline payment. And if someone buys something I have to go and click the "paid" button so it goes out of stock. So imagine if someone buys something in 2 am and the another person buys the same thing in 3 am (when i'm asleep) in the morning i have to tell to the second person that he can't get his order cause it's out stock and that there is a bad customer experience. So my questions is does anyone know if I can make the product to go automatically "out of stock" when someone orders them? Sorry if I did not explain the problem perfectly. Thanks in advance.