Hello @Seller_UkT5sfjf9gjN3

My name is JiAlex from the Community Manager team here on forums. I wanted to follow up on your post. In regard to your inquiry, Generic is an unbranded product that do not belong to any identifiable brand. This means, this cannot be restricted to other sellers, and it can be update once someone register brand for those products, at this moment the years tenure you may have selling a product under generic brand does not mean you will have ownership on the detail/ASIN contributions.

As a related subject, I wanted to share the Seller University video, "Sell with a registered brand, an unregistered brand, or generic products" and the Amazon Generic Product Policy in case you would like to learn more about generic products and their selling guidelines. Also here is the Suggest changes to your product detail page

Any assistance, don’t hesitate to reach out our support channel

Regards,

JiAlex