If you encounter issues with incorrect or outdated attributes for Smart Recommender, the steps you need to follow are the same as those for out-of-stock items.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
An attribute value still appears after I removed it from my XML file:
Removing an optional attribute from your XML feed doesn’t clear its stored value. The product keeps its last stored value.
To clear the stored value of an optional string attribute that accepts empty values:
Keep the attribute’s XML field in your feed.
Keep the corresponding product attribute mapping.
Send the XML field with an empty value.
If the mapping uses a Custom Match expression, make sure it handles empty values and returns an empty string rather than a fallback value.
After the next successful scheduled synchronization, open the affected product in Catalog Manager and confirm that the stored value is empty.
Don’t use this method for required attributes, price, or currency.
For mapping and synchronization guidance, see Integrate Your Catalog with XML.
Catalog API
When sending data via the Catalog API, ensure you use the correct attribute names in your request.