Error 8029

The attribute you are attempting to update [attribute] is protected and cannot be updated by non-authorized sellers.

This error occurs when processing part of your feed would change an attribute that is write-protected. Only authorized sellers, such as internal Amazon business teams, are able to change the value of these attributes (for example, " is_adult_product" or "hazmat").

To address this error, remove the attribute in question from your update and resubmit.