This is a required field.
Best practice shows us that each product should have a unique product code. We don’t force you to have a unique product code but it is highly recommended and will help you avoid any potential product conflicts later on. By default we populate this field with the next available option. If you aren’t worried about product codes then please just leave this field with the suggested value.
NOTE: Your product code is searchable on the search results and can be used to identify the product when an order is placed. If your product is using multiple variants then we require each SKU line to have a unique code within the product.