Amazon labelling

I have a trademarked brand which is already registered in Amazon’s Brand Registry. The products of this brand come in 2 size variations 2kg and 12kg. All products will come in single SKU pallets. Each pallet of 2kg products contains 24 cartons with 4 pcs of 2kg bags each. Our 12kg pallets have 30 or 28 bags (depending on the SKU) which are stacked in layers without any cartons being used. All of our products have UNIQUE EANs (manufacturer barcodes) and all 2kg cartons have their own unique EANs (manufacturer barcodes) along with the the best before date which is printed on the bags and the cartons. Since the barcodes I use are unique and I will be the sole seller of these products on Amazon, do I still need to label each bag of pet food with Amazon’s barcodes? This is my main question here. Because the information that Amazon wants me to print is already found on my products’ packaging therefore I cannot understand the need of covering my information and placing a sticker from Amazon which will state the exact same thing that I covered.