I go to mariadb.com/kb and enter JSON_TABLE into the search field.
I get the search result with two JSON_TABLE pages on top (screenshot is attached).
The first result is https://mariadb.com/kb/en/json-functions-json_table/ and it opens to "404 ERROR: Page not found".
The second result is https://mariadb.com/kb/en/json_table/ and it indeed opens the JSON_TABLE page.
The non-existing one shouldn't show up in search results.