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Why this issue is happening
One or more of the values you submitted for the GTIN [gtin] attribute is only used for coupons (starts with 981, 982, 983, 984, 99, or 05), and isn't a globally valid value.
How to fix your issue
Make sure you submit the globally valid value for the GTIN [gtin] attribute or leave the value blank if the product doesn’t have a GTIN.
For more information about the validation of GTINs, refer to the GTIN Validation Guide edited by GS1, the organization that maintains GTIN standards.
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 product you want to fix, then click Edit product.
Make sure that each affected product has a valid GTIN
[gtin] attribute.
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 a valid GTIN
[gtin] attribute.
Reupload 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.