Some 404 pages are redirecting to other website’s pages in wordpress

In my website some 404 pages are redirecting to other website’s pages. When I removed wordpress basic .htaccess code then it goes to 404 page. But as you know we can’t remove the basic .htaccess code of wordpress so please tell me the solution how can I get rid of this issue. Here is the 404 link that is redirecting to another page automatically. And here is the .htaccess code that causing the error.

   <IfModule mod_rewrite.c>
   RewriteEngine On
   RewriteBase /
   RewriteRule ^index\.php$ - [L]
   RewriteCond %{REQUEST_FILENAME} !-f
  RewriteCond %{REQUEST_FILENAME} !-d
  RewriteRule . /index.php [L]

  </IfModule>

• This topic was modified 4 years ago by Yui.
• This topic was modified 4 years ago by Yui. Reason: redundant link(s) deleted

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