Problem with page indexing after changing the theme

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Topic summary

After a theme change and edits to products/subpages, Google Search Console shows many pages not indexed. Reported statuses include: Not found (404), Page with redirect, Alternate page with proper canonical tag (many URLs end with &currency=PLN), and Crawled – currently not indexed.

The poster suspects Google is still referencing the old site structure and sitemap, and asks if old-site errors can be removed to better isolate current issues. “Alternate page with proper canonical” indicates Google sees parameterized variants (e.g., currency) and is indexing the canonical version instead.

A reply states there’s no known way to remove historical warnings/errors for old URLs in Search Console. It also questions the scope of changes and cautions that changing URLs can severely impact existing SEO.

No resolution yet; the key open point is how to handle legacy indexing noise versus current-site problems.

Summarized with AI on December 26. AI used: gpt-5.
1

My client changed the theme of the store, some products and subpages.
Google search console now displays a message about a large number of unindexed pages. These are mainly messages about Not found (404), Page with redirect, Alternate page with proper canonical tag (many products with this URL ending &currency=PLN are displayed here) and Crawled - currently not indexed.

I assume that Google still remembers the old website and its subpages, which is why it receives so many warnings. Is it possible to remove errors caused by the old website and its sitemap so that it will be easier to detect problems with the current website in the future?

2

Not aware of a way to remove the warnings and errors for old webpages. Is there any reason why the client changed so much? Changing URLs can have devastating effects on existing SEO.