Canonical points to 4xx

How to fix it

Repoint the canonical at a live URL or remove the canonical tag entirely.

Sibling checks in this category

• Canonical points to 5xx - The canonical URL returns a 5xx error.
• Canonical points to redirect - The canonical URL redirects. Search engines may follow it but the signal is weakened.
• Canonical has no incoming links - The canonical URL is not linked anywhere internally, suggesting the cluster is fragmented.
• Canonical http to https - The page is HTTP but its canonical is HTTPS. Expected during a migration; should not persist.

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