EXT:seo, Side Properties and Detail Extension
Check site base, language prefix, and stored canonical value together. An old host or slug can only lead to the right page after a redirection.
Open the dataset of the affected page and compare a set canonical override with the site base and the real language URL. In the case of a news or product detail page, you also check whether the extension brings in its own canonical source. A fixed target fluid snippet shall not double the dynamic assignment.
Where to check the setting in TYPO3
In TYPO3 13.4, control the SEO page properties and output of EXT:seo. For detailed pages, you also check the CanonicalGenerator or adjustments to the extension. Do the site’s basic URL and language configuration match the published target?
Example of this specific finding
Illustrative control case: The canonical points to /ratgeber-alt/, this address redirects to /ratgeber/. The desired final URL is already known.
follow-up audit in TYPO3
Get a default page and a detailed view of the same site. If the finding occurs only in the detailed view, first examine its output instead of the global site configuration.
Spend the final matching goal directly in the canonical. Orient sitemap and internal links to the same address and verify their response.
Derogations and scope
A forwarding does not automatically make the content unusable. The result initially shows an unnecessary or possibly contradictory intermediate signal.
Reference: TYPO3 13.4 with EXT:seo. For other major versions and own extensions, responsibilities may differ; check the actually installed output.
Classify the general error
Definition, system-independent causes and further correction examples: Deposit the final address in the canonical