Introduced in version 188.8.131.52
When you create a new product, by clicking on the New button on the Products screen (shown below), if you use a SKU that matches that of an existing product, the existing product details will be overwritten.
This has been fixed in this release. When you now create a product with the same SKU as an existing product the new product will be created (and the existing product will not be changed).
Having products with the same SKU allows you to sell the same product on different selling channels under different names and prices etc, and still manage the order packing and stock levels from a single product.
For more information click on the following link: