To remove this problem redirect all urls on single url. Some methods to solve this problem are given below;
Create .htaccess File
Redirect WWW to non-WWW
RewriteEngine on rewritecond %{http_host} sitesbay.com [nc] rewriterule ^(.*)$ http://sitesbay.com/$1 [r=301,nc]
Redirect non-WWW to WWW
RewriteEngine on rewritecond %{http_host} sitesbay.com [nc] rewriterule ^(.*)$ http://www.sitesbay.com/$1 [r=301,nc]
.htaccess: This file is mainly used for redirect url, to create this file you can create any file and save with .htaccess file name.
Note: You can also redirect using cpanel.
Source page - http://www.sitesbay.com/seo/seo-canonical-issue