If you encounter issues with incorrect or outdated attributes for Smart Recommender, the steps you need to follow are the same as those for out-of-stock items. The additional steps based on the source that you should check are:
ProductFeedETL (Clickstream)
To check whether the attribute is collected correctly on your website:
To see the custom attribute, copy Insider.getCustomProductAttributes() and paste it into the Console.
The product must be visited for attributes to be updated on the feed.
If a product attribute, such as price, is updated but the product hasn’t been visited, the attribute won’t be updated in the feed.
XML
To verify that the attributes are mapped correctly, refer to the XML-Based Product Catalog Integration Methodology for a clearer understanding of the integration process.
Catalog API
When sending data via the Catalog API, ensure you use the correct attribute names in your request.