Website URL: http://www.breadandbutter.co.nz
This website sells products that are generally one of a kind and once purchased are removed from the catalogue. However, when a product is added to the cart and the customer returns to continue shopping they are able to add the product again (multiple times) even though it is a one off item and thus creating a negative stock level (ie; -1 products in stock). As the product is unique it is not possible to supply more than one.
Is there a way to avoid this happening?
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