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Copy-Distinct/CopyDistinct.cs

@@ -137,6 +137,8 @@ public class CopyDistinct
         {
             foreach ((FileHolder fileHolder, string to) in toDoCollection)
             {
+                if (File.Exists(to))
+                    continue;
                 results.Add(fileHolder.NameWithoutExtension);
                 try
                 { File.Copy(fileHolder.FullName, to); }