(1) Download a template that matches the item category of all child listings. You’ll want to create a parentage in the back-end to avoid errors in uploading.
(2) It’s best to group together the listings with the same Brands/Manufacturers/Categories per parentage to avoid errors in uploading.
(3) On the template, make sure to fill out the parent name completely except for its size and color.
(4) On the template, always make sure to fill out the update_delete “PartialUpdate” and condition_type “New” headers.
(5) If there is no condition_type header in the template, you can just add it at the end of the template’s headers.
(6) If bullets and description are available, please add them to parent details.
(7) When selecting a variation_theme, please make sure that each child listing has a unique size or color attributes to avoid errors in uploading.
(8) Lastly, try to troubleshoot and fix the error encountered on uploading. If nothing works, call or file a case to Amazon.