If you receive this error then it is usually related to the condition type of the product for example, if you send the wrong condition type. Please note, condition types can vary by category.
You can check your condition type by clicking edit product. Condition types are listed under the “Identity” tab.
IMPORTANT NOTE: Kindly check the products category from Amazon Seller Central to see categories and their condition types.
You can also use “Condition Mapping” in order to send certain condition types to Amazon by setting this channel level settings. This may be helpful if your products are all in the same category, for example.