This is typically when Amazon’s validation against the GS1 Database finds a mismatch in the company name associated to the GS1 Company Prefix and what is provided when listing on Amazon’s marketplace. The two need to be closely matched. This is remedied by providing Amazon the GS1 Company Prefix and/or GS1 US GTIN Certificate, and requesting Amazon to check GEPIR to resolve your issue.
Alternately this is caused by the case where the company name doesn’t match the brands and Amazon is looking to establish that link with an authoritative source. If this is the case, you should apply for the Brand Registry at Amazon.