I cant to import product without Vendor

I need to import products in a bulk upload process without associating the product with a specific supplier, but when I upload this file in CSV format an error appears, because the platform forces me to assign a supplier to each product.

Now I don’t need to associate it, because I want to make all the products available to all the suppliers, and then it will be the seller themselves who will select the specific product they want to sell on our platform, thus avoiding them having to upload their products one by one.

How can I achieve that? How is that problem solved?