I was wondering the same here. I have a collection of products and another of prices. Each product could have several prices. I'd like to know if I could sort those prices, but I'm receiving the same error above: "Multiple references found to sort by on `prices.value`" The other option would be doing the request directly from the prices collection joining the products collection and grouping by prices.product_id. The sorting works, but then I lost support for facets on the products collection because of this issue (https://github.com/typesense/typesense/issues/1706) :(