@droyed
Upon performing a link-specific search i.e. <site:URL> on Google, we do see the given URL is already indexed by Google. That means the URL is discoverable on Google search results and what Google Search Console is reporting you for that URL is a false-positive message and would not hurt your site SEO.
Also given the fact that, when you did a live test on Google Search Console, it says that the page is available on Google with no issues.
To address this false error in Google Search Console, we suggest the following actions:
1. Clear all your caching from your theme, plugin, server, CDN like CloudFlare or browser. If you are not sure how to clear caching from theme/plugin please speak to those authors. If you want to clear cache from the server, please speak to your host provider. To clear the cache from a browser use this guide:?https://kb.yoast.com/kb/how-to-clear-my-browsers-cache/.
2. Delete your sitemap in Google. Doing so will not hurt the SEO of the site. This guide explains more (scroll to the bottom):?https://support.google.com/webmasters/answer/183669?hl=en.
3. Submit the sitemap again. Be sure to submit only sitemap_index.xml and nothing else. This guide explains more:?https://kb.yoast.com/kb/submit-sitemap-search-engines/.
4. Monitor the results to see if the issue is resolved. It can take some time before Google can report on the crawled URLs after you re-submit your sitemap. Google Search Console reports?are not real-time.
We hope this helps. Let us know if you’ve any further questions.
