> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.widebundle.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Google Merchant Center rejected my product with WideBundle!

Wide Hello!

|| 💡 This article is only useful for bundles created with the variants' system, not for automatic discounts. [Learn more about the difference](https://help.widebundle.com/en/article/differences-between-automatic-discounts-and-variant-bundles-ootmn6/) ****

If Google Merchant Center is rejecting your Shopify product that uses WideBundle, you may have an error message indicating the problem like here:

![](https://storage.crisp.chat/users/helpdesk/website/59d08aea42fadc00/image_1tfsgu6.png)

Depending on the message the solution can be different.

1) If you have the message "validation/missing_required: Invalid or missing required attribute: id

You will have to add SKUs to your variants created by WideBundle. Each SKU must be unique and you can create them yourself if you don't have any

[What is a SKU?](https://help.shopify.com/en/manual/products/details/sku)