New products are those which do not currently exist in a brand owner’s portfolio and are new to the market. The GTIN Management Standard requires that if a product is new to the market, it should always be assigned a new GTIN to accurately distinguish the new product from any existing product in market.
Changes to existing products are considered “replacement products” (the previous version will no longer exist once the replacement product has flowed through, as determined by the brand owner). The GTIN Management Standard defines when a change to certain attributes of an existing product in market is such that a new GTIN is required.