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Are you using a CMS, or some inhouse solution? If it is a CMS, in many cases you should be able to update that CMS so that the 2 links are generated but the page itself isn't generated twice. Another option if 2 pages must exist, would be to set a canonical on both pages to the 1 main location for the content, while using a pushstate on the url to manipulate the browser into the main pathing. Although the more I think about that one, it may not be a 100% viable option.