Catalog SEO Configuration and Store View Scope
Check category follow-up pages with their own product selection. The specific canonical edition must be evaluated before a global category rule is changed.
Compare canonical settings for products and categories in the effective configuration range. A store view can override an inherited value; layered navigation extensions can also bring in their own rules.
Where to check the setting in Magento
Under Stores → Configuration → Catalog → Catalog → Search Engine Optimization, check the canonical specifications for products and categories in the right scope. Also, compare URL rewrites and extensions for layered navigation. A Store View deviation must not be obscured by a global setting.
Example of this specific finding
Illustrative control case: /Category/? page=2 shows other products as page one, but refers to /category/ via canonical. The content is not identical.
follow-up audit in Magento
Compare a product via direct and category path as well as a filter page. Do not force all filter combinations to the same address without checking their contents.
Treat each independent following page with a suitable canonical URL and keep it accessible via retrievable links. Check product distribution and link path.
Derogations and scope
A true full view-all page requires a separate decision. Not every page-two URL has to get the same rule without looking at the content.
Reference: Magento Open Source or Adobe Commerce with classic storefront. Consider store views and extensions; other storefront architectures have their own configurations.
Classify the general error
Definition, system-independent causes and further correction examples: Subsequent pages are not automatically duplicates of page one