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My company has a popular website that has over 4,000 crawl errors showing in Moz, most of them coming up as Duplicate Page Title. These duplicate page titles are coming from pages with the title being the keyword, then location, such as: "main keyword" North Carolina
"main keyword" Texas ... and so forth. These pages are ranked and get a lot of traffic. I was wondering what the best solution is for resolving these types of crawl errors without it effecting our rankings. Thanks!