Noindexed page is listed in the sitemap
What this means
The sitemap nominates this URL for indexing while the page itself refuses indexing. Google treats the pair as a contradictory signal: it spends crawl budget fetching a URL you have declared submittable, then discards it. Sustained contradictions also reduce how much the sitemap is trusted overall.
How to fix it
Decide which signal is correct. If the page should be indexed, remove the noindex directive; if it should not, drop the URL from the sitemap so the two agree.
Fix effort
This check needs review: the change can be drafted for you, but a person has to approve the wording or choose the target before it ships.
Authoritative source
https://developers.google.com/search/docs/crawling-indexing/sitemaps/overview
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