100% of id values received in the past day didn’t match your feed

My store has variable products. In google ads, I get the error “100% of id values received in the past day didn’t match your feed”. I do understand this is most likely caused by a mismatch between the id from the data layer and from the feed.

Here’s my situation:
My site shows variants along with its item_id. However, it seems this conflict happens because prodid is the parent and not the variant. In my example URL (https://actioncurves.com/product/american-grown-irish-roots-leggings/), the prodid is 463, but item_id is 467. My feed has IDs of each variant. Could this be the reason I have the error?

How can I fix it? BTW, I have also included the URL of the feed.

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