Initially I launched my site without "WWW" and my "sitemap.xml" also submitted without "WWW". After one month I changed my site all pages to with "WWW" also changed sitemap. Added htacess for redirect non "WWW" to "WWW". Now my problem is my all page indexed without "WWW". Now my pages are indexing with "WWW". Does it make any issue like content duplication? or SPAM? How do i nonindex my all non www pages? Is it cause my SEO?