Quick Snap Shot - Listing Errors and Warnings

Use the screen capture below to navigate to Listing Errors and Warnings.  From the error or warning itself you can click into it to view affected products.

Overview Errors and Warnings

  1. Below is a list of common validation errors and warning with solutions from Amazon Australia.  
  2. These listing errors and warnings do change and are updated from time to time, we are always adding new errors as they appear.
  3. If you have a product validation error for warning that is not on this list please let us know.

1) You are not authorized to list products under this brandTo solve this error, follow below procedure:
a) In Seller Central, click the inventory link and select ‘Add a Product’.
b) Run a search for the item you wish to sell.
c) In the search results, click the ‘Listing limitations apply’ link for that item.
d) Click the Request Approval button to begin the application process.
To check the status of an application, return to the ‘Add a Product’ tool and click the Selling application status link located toward the top of the page in your Amazon selling account.
2) You are not authorized to list products in this product line or categorySome categories and product lines require approval from Amazon before you can list.  For more information see Categories and products that require approval
3) Merchant is not authorized to sell products under this restricted product groupTo request approval, either contact Seller Support or
follow the steps below:
a) In Seller Central, click the inventory link and select ‘Add a Product’.
b) Run a search for the item you wish to sell.
c) In the search results, click the Listing limitations apply link across from the item.
d) Click the Request Approval button to begin the application process.
To check the status of an application, return to the Add a Product tool and click the Selling application status link located toward the top of the page. For more information please see Restricted Products
4) Missing Attributes standard_product_ida) There is no barcode (UPC/EAN) associated with the product or one of the variants. Add the relevant barcode to your website product and resubmit.
b) The barcode you have provided is not recognised by Amazon. Please check it is the correct registered barcode for your product.

5) Missing Attributes manufacturer_minimum_age

The Manufacturer Minimum Age attribute field needs a value, this can be added in Omnivore under Products - On Amazon - Marketplace Attributes Tab. Search on this page using the SKU and scroll across to see the Manufacturer Minimum Age field where you can add your value.
6) The SKU data provided conflicts with the Amazon catalogThe data provided by the retailer is conflicting with what Amazon has in the database. For example  (Merchant: '' / Amazon: '16192'). The retailer can update their content to match Amazon OR petition Amazon to change the data.
7) We could not access the media at URL A 403 HTTP status code was received. Ensure that the server or firewall configuration is not blocking Amazon servers from accessing the media.Possible Causes
1) Your server or website firewall settings may be blocking access to the Amazon servers when they are accessing your product image URL's. The error can be caused by the Amazon server accessing a large number of your images in a short period of time and triggering rate limiting or blocks.
The solution for this is to allow all product images on your website to be accessed without rate limiting or blocking the Amazon servers. The fix will vary depending on your website and/or server setup so you will need to refer to your developer.

2) This error can be transient and may sometimes clear on its own over time. It is possible Amazon could not access the image at the time the feed was sent. This could be due to temporary network or server issues. Try re-uploading your products to Amazon from the Omnivore Dashboard.

3) If there is an image in the product page in Omnivore, right-click the affected image in the Omnivore product page to open the image in a new browser tab. Check the URL shown and compare it to the URL in the Amazon error message. If the URL's are different, then your website has an HTML redirect. Please refer this to your developer.

4) If no image is showing in Omnivore, Amazon also cannot access the image. You should update the product image/s on your website.

5) This message is now a warning on the product page in Omnivore.  Warnings are in blue not yellow. Omnivore will not make any changes to the listing on Amazon, it will still remain listed, but the warning is there to let you know that they have detected an image URL anomaly on that product.
8) A value is required for the "part_number" fieldMPN is required
9) You cannot change the 'item_classification' for SKU 'XXX' by submitting a feed with a new value. To change this attribute, do the following: 1) Submit a feed to delete the existing SKU. 2) Submit a feed to recreate the SKU with the updated 'item_classification'This product classification has changed from a multi variant / single variant OR single variant / multi variant. For more information see Change variant
10) Marketplace Product Variant SKUs are not uniqueThis product variants are duplicated.  Variant attributes need to be unique  for example colour black, size small etc
11) You may not change the brand name on this ASIN. Please use the brand name currently shown on the ASIN detail pageIf you believe you are using the correct brand name, contact Amazon Seller support and mention the error code 5461.
12) Please provide a variation theme when creating a variation parentThe variation used for a product is not yet configured for that category in Omnivore.  Omnivore Amazon integration is currently only configured to support colour and size.
13) UPC/EAN is too short/longThe barcode UPC is missing characters or contains too many.  Please check the UPC against that product.
You can check GTIN existence here
14)"Message/Product/DescriptionData/MerchantShippingGroupName" (XXX) field contains an invalid valueThis indicates that the shipping policy in Omnivore does not match the naming convention in Amazon.  The shipping template name must be replicated exactly and is case sensitive.
15) Cannot serialise to Amazon Australia feed format, error = Cannot find the Amazon product typeThe category is not yet available on Amazon Australia
16) A value is required for 'department_field'There is a required attribute for a specific category / sub category. Add in the Attribute and resubmit the feed.
17) A value is required in the "dvd_region" field because there are values in dependent fieldsDVD region is required by Amazon to list in this category. If the data is not in your feed, you can add it via Marketplace attribute section. See FAQ on this
18) A value is required in the "blu_ray_region" field because there are values in dependent fieldsBlue Ray Region is required by Amazon to list in this category. If the data is not in your feed, you can add it via Marketplace attribute section. See FAQ on this
19) Cannot serialise to Amazon Australia feed format, error = Failed to marshal payload : The content of element 'BooksMisc' is not complete. One of '{Author, Binding}' is expected.]]If the product is mapped to a "book" category, you must supply all the required information, like Author.
If its not a book, map it to the correct category.
20) We do not support the file type of the image uploadedAmazon does not support all image types, particularly gifs. To block unsupported images please see this Article
21) A value is missing from one or more required columns from this group: [is_expiration_dated_product = "true"], [product_expiration_type = "Expiration Date Required"],Add a marketplace attribute for is_expiration_dated_product with a value of No
22) Missing Attributes product_type. SKU xxxx doesn't match any ASINs. Make sure that all standard product ids (such as UPC, ISBN, EAN, or JAN codes) are correctThe attribute product_type is determined by the category you are listing the product in. When the product_type is missing, can be related to 
  • category the product in is not mapped to an Amazon category
  • GTIN data
  • Brand

So please check each of these to ensure they are correct

23) Missing Attributes standard_product_id. SKU xxxx-xx doesn't match any ASINs. Make sure that all standard product ids (such as UPC, ISBN, EAN, or JAN codes) are correct.Typically issues with UPC code, Brand, Category.

No barcode (GTIN) is provided at all or the one provided is invalid. Amazon cannot associate the offer with an existing catalogue item (ASIN), or create a new one.
So please check each of these to ensure they are correct.

24) SKU xxx-xxx is associated to more than 1 GCID, which is not allowed. Please send a delete feed for this SKU and all other SKUs with the same attribute values [merchant_suggested_asin], and then resubmit the SKUsAmazon returns this error when there are two ASINs with the same UPC data on both of them. You will need to manually link your product to the correct ASIN using the Link to ASIN feature.
25) The SKU data provided is different from what's already in the Amazon catalog. The standard_product_id data provided matches ASIN xxxxxxxxxx, but the following data is different from what's already in the Amazon catalogAmazon product data differs from your product for the GTIN you provided. Please review your GTIN information and check the ASIN matching screens to ensure the data is correct.
26) SKU does not match any ASIN and the product data provided is not eligible for ASIN creation. Along with:
You are using UPCs, EANs, ISBNs, ASINs, or JAN codes that do not match the products you are trying to list. Using incorrect UPCs, EANs, ISBNs, ASINs or JAN codes is prohibited and it can result in your ASIN creation privileges being suspended or permanently removed. Please ensure you are always using the appropriate UPC, EAN, ISBN, ASIN or JAN code when listing a product. If you have reached this message in error, please contact Seller Support using the following link: For more information, refer to the ASIN Creation Policy Help Page -

Relates to bad GTIN information, so please check these to ensure they are correct and resubmit.
Also check error #40 below on this FAQ.
27) A value is required for the "is_expiration_dated_product" field

Please submit a ticket here with the category and we can add it to the list of auto-populated categories that use this attribute.
28) We have temporarily removed your ability to submit listings (creating new offers or new ASINs) because an unusually high number of listings have been created from your account.

Self explanatory and goes away after time.
29) The following attributes are missing for SKU: [XXXXXXXXX]: [manufacturer]

Omnivore automatically sends the brand name of your product in the [manufacturer] field. The most likely cause is there is an existing ASIN that may have originally been created by you with a different value or an empty value. Please raise a support ticket directly with Amazon to have the manufacturer value added or updated
30) Please indicate that the item is a variation parent before setting up variation relationships. Along with: You may not create new variation relationships for this Brand. You are free to add offers to any existing ASIN for this Brand.

No solution yet, submit a ticket here
31) Amazon Australia validation error: SKU <SKU> does not match any ASIN and contains invalid values for attributes required for creation of a new ASIN. New ASIN creation requires the following attributes, for which this SKU provided invalid attribute value(s): merchant_suggested_asin

This error is caused when the ASIN specified in the linking screen is no longer a valid ASIN on Amazon. It can be due to there being previous GCID errors so a manual link to the ASIN was done in Omnivore but Amazon has since cleaned up the duplicates in their data and we are linking to the ASIN that no longer exists.  Please re link to the remaining active ASIN in Omnivore.
32) Please review your selling price and maximum price and ensure that your maximum price is greater than or equal to your selling price

Your Amazon listing has been flagged because the price of the item is greater than the maximum price set in Seller Central. 
33) The MAIN image that you have submitted shows a product that is different from the product represented by the ASIN's existing MAIN image.To resolve this problem, remove or update your contribution's MAIN image so that it shows the correct product, or update your contribution's identifying information (e.g. UPC, ASIN) so that it corresponds to the product shown in your MAIN image .; SKU <SKU>
34) Unable to list any product items (check warnings)When you see this error it will appear as a  yellow error message.  Please scroll down and also then check the blue warning messages.  It is likely that every variant has an issue and therefore the product and variants are not listing. Pay attention to the extra information in the warnings.  The warning message is most likely another common error in this FAQ so check this FAQ for that warning and fix.
35) Invalid ProductType value for SKU: [<SKU>]For help fixing this see:
36) You may not create new ASINs for the brand <brand>.If you believe the product you want to sell is not currently in the Amazon catalog and should be added as a new ASIN, please copy and paste the following URL in a separate window and complete the form. You will need to take the URL from your error on your product and use that URL as it will be product specific
37) Amazon Validation Error: These products require a change to Omnivore for them to list on Amazon. Please contact the Support Team for further assistance.Contact our Support Team by raising a ticket.  Send a direct link to the product in Omnivore or the product name, SKU and Brand.
38) Please check that this product is mapped to the correct Amazon category then check the Amazon marketplace attribute requirements for this product.As explained.  You may need to map the products in Omnivore to a different Amazon category.

39) Your seller account is not approved to offer
seller-fulfilled products in this category at this time

Error 4400


This error occurs when a seller is only authorised to sell products using the Amazon Fulfilment Network (AFN) due to policy violations, seasonal restrictions, or customer complaints. If you are trying to sell using Merchant Fulfilment Network (MFN), the offer will be un-buyable. If you have already chosen AFN as your fulfilment channel and your offer is live for sale, you can ignore this error. However, if you have confirmed that the SKU is listed as AFN and find that the offer is not live, contact Selling Partner Support.

If you would like to list through MFN, verify as mentioned below:

If a policy notification was issued for that ASIN under Performance Notifications, navigate to Seller Central > Performance > Account Health to see listings that were removed due to policy violations and contact Selling Partner Support with the relevant information.

Under Account Health, if it states 'Your seller-fulfilled offers have been deactivated', then click Reactivate and submit a plan of action or appeal the decision to restore seller-fulfilled privileges.

40) Amazon Australia validation warning:

SKU does not match any ASIN and the product data provided is not eligible for ASIN creation. Please check 1) your UPC/EAN/GTIN is registered in the G1 tool or 2) ensure brand name used to list the product is the exact brand name or affiliated with the UPC/EAN/GTIN. If these steps did not work please log into your account and search error code 8566 for further information

This error points to one likelihood that the UPC (barcode, product identifier) is registered to brand called (example) 'Big Dog' but the brand name on the product with the error is 'Big Dogs Bark' which is not what Amazon

is expecting. Also, as per the error also check the UPC G1 tool. Further error code searching in your Amazon Seller Account will also help.

Message/Product/DescriptionData/MerchantShippingGroupName" (NZ Post - Ship to Australia) field contains an invalid value.

This error occurs when the Shipping Policy names in Omnivore and Amazon do not match exactly, it necessary that they do match and also be the same case.  Please check your shipping policies between the two systems and correct where needed.
More reading for additiona help.

Cannot invoke method value() on null object[WILL SHOW A SKU] java.lang.NullPointerException: Cannot invoke method value() on null object.

If an Amazon product has a warning Cannot invoke method value() on null object


This will mean that we are missing something at a category level in Amazon which will need a dev to look at or update.


Amazon Australia validation warning:

[SKU XXXXXXX] Incomplete

If you see this warning in Omnivore on your products you are best to log in to your Amazon Seller Central account and check the listing in your suppressed listing section.  In this section in Amazon it will show you the reason the listing is imp