URL casing structure in our sitemap is example.com/Abc-My-Page.htm We have used rel=canonical tag on example.com/Abc-My-Page.htm (rel=canonical example.com/Abc-My-Page.htm) But when we manually type the URL in browser example.com/abc-my-page.htm it also opens (rel=canonical example.com/abc-my-page.htm, this we did not created but can be seen on this page) Though there is no link from our website that points to example.com/abc-my-page.htm Now the question 1) Is this an issue of duplicate content/canonical?