URL rewrites, category paths and stored CMS links
Check fixed links in CMS blocks and product texts. They are not automatically rewritten to the final destination by a new URL rewrite assignment.
Check the target’s actual effective rewrite and store-view context. Manual links in CMS blocks can keep an old path, even if product links are already newly created.
Where to check the setting in Magento
Under Marketing → SEO & Search → URL Rewrites, check the current assignment. Compare these to stored links in CMS blocks and category texts. Multiple sequentially changed URL keys can otherwise leave unnecessary forwarding chains.
Example of this specific finding
Illustrative control case: A guide links to /sortiment/alt/, the landing page responds with 404. The location is the guide, the error answer comes from the destination.
follow-up audit in Magento
Document source link, rewrite and final destination as a chain. After a correction, check the other affected store views with the same product.
Change the link at the location to a suitable, accessible address. After that, retrieve the same found page and follow the link that was actually issued.
Derogations and scope
If there is no suitable replacement, removing or rephrasing can be better than redirecting to the start page.
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: Repair the linking location and the link destination separately