Environment a 4XX HTTP status code to get a canonicalized URL has the same outcome as using the noindex tag: Google will likely be unable to see the canonical tag and, thus, can’t transfer “link fairness” to the canonical version. If you are using WordPress, there may be a setting https://natural-bookmark.com/story18785839/etiquetas-autom%C3%A1ticas-hreflang-canonical-etiquetas-seo-for-dummies