You have reached the limit on the number of ASINs you are allowed to create. You can continue to match your products against existing ASINs. Please refer to the ASIN Creation Policy page for more information on how to avoid receiving this error message.
You might see this error if you have not yet established a sales history with Amazon. As you increase your sales, your capacity to create new ASINs will increase.
If you are an established seller and have created a high number of new ASINS, we reserve the right to temporarily remove your ability to create new ASINS. Your status will be reevaluated monthly.