یه مشکل در خصوص دومین سایتم

سلام
کسی میدونه این ارور برا چیه؟
ممنون
Your website does not direct www.siteman.com and siteman.com to the same URL. It is crucial that you fix this.

Redirecting requests from a non-preferred domain is important because search engines consider URLs with and without "www" as two different websites.
Once your preferred domain is set, use a 301 redirect to re-route all traffic from your non-preferred domain.

درود

این ارور رو کجا مشاهده میکنید؟