After years of backlash, Amazon finally ends a practice that many sellers have long loathedNadya Dhalla, director of Supply Chain by Amazon, announces a major policy change Wednesday. To avoid commingling, sellers have long had the option to apply a unique, seller-specific Amazon barcode — known as an FNSKU (Fulfillment Network Stock Keeping Unit) — to every product. Driving the decision was a cost-benefit analysis of the supply chain. That means Amazon can trace and route a seller’s specific product, without needing to mix it with inventory from others. Nadya Dhalla, director of Supply Chain by Amazon, announced on stage Wednesday morning that commingling will be phased out across its supply chain later this year.