In this article
Why this issue is happening
Two or more of the products in your product data use the same values for the GTIN [gtin], multipack [multipack], and condition [condition] attributes. This could be because you have one product listed twice in your product data or because you’re using the same GTIN for 2 different products. If targeting the same language and country with multiple feeds, ensure that there are no duplicate GTINs across those feeds. To ensure that Google can correctly identify your products, you’ll need to remove duplicate products, provide correct unique GTINs, and fix any errors in the multipack [multipack] and condition [condition] attributes.
This issue (Duplicate value: GTIN [gtin]) also occurs when you submit the same GTIN value for products that should be grouped together using the item group ID [item_group_id] attribute. These products are the same kind but come in different variants such as size and color. Submitting unique GTINs for each variant and adding the item group ID [item_group_id] attribute ensures that the product and its variants are shown to customers as a group rather than separately.
How to fix your issue
To resolve this issue, review the products in your product data and make sure you’re not using the same values for the GTIN [gtin] attribute on multiple products.
Fix products one by one directly in Merchant Center
Navigate to Products in Merchant Center, then select the Needs attention tab.
Use the filter icon
above the table to find all products affected by your issue.
Click on the title of the issue you want to fix.
Make sure that your affected product has an accurate and unique GTIN
[gtin], and that you’ve submitted correct values for the multipack [multipack] and condition [condition] attributes.
Select Save.
Fix multiple products at once
Navigate to Products in Merchant Center, then select the Needs attention tab.
Use the filter icon
above the table to find all products affected by your issue.
Select the download icon
to download a list (.csv) of all affected products for all issues or this particular issue.
Cross reference the downloaded list with your uploaded product data, and make sure that each affected product has an accurate and unique GTIN
[gtin], and that you’ve submitted correct values for the multipack [multipack] and condition [condition] attributes.
Submit a unique GTIN for each variant. Use the item group ID[item_group_id]attribute for items that are different variations of the same product.
Re-upload your corrected product data to Merchant Center using your chosen upload method.
Next steps
After making the requested changes, check that you’ve fixed the issue by making sure it’s no longer listed on the “Needs attention” page.
Keep in mind: It may take some time for your change to be reflected on the “Needs attention” page.