GTIN

 
Global Trade Item Number (EAN article number, UPC article code, or DUN article code).
 
1. Change of content
For example, if:
  • The recipe or composition changes (for example, a different material).
  • Number of pieces in the package changes.
  • Weight or volume changes in a way that is relevant to consumers.
2. Major functional changes
For example:
  • Addition of a new feature.
  • Change in product type.
3. Change in brand, product name or product category
If it impacts how the product is marketed or perceived by consumers.