I am going through different ahrefs reports and copy/pasting any backlinks that I like to investigate into an Excel sheet. When I copy/paste sometimes the backlink already exists in the excel sheet because I had already found it from another competitor's website, so I end up with a lot of duplicates. so for examples, Forbes.com Engadget.com Articlebase.com Forbes.com see? Forbes appears twice. Is it possible to set up excel so as soon as I paste the duplicate domain, excel somehow indicates that this entry already exists?