When you are creating new products in your webshop using a WooCommerce plugin, you can get the unique SKU error for your product and SKU can’t be saved properly. This happens because in the database there are old variations of previously created products that have the same SKU number. WooCommerce SKU Error Fixer plugin solves this problem by cleaning and/or removing old products variables and also you can setup automatic checking and fixing of non-unique SKU problem when you edit a product.