If you have archived pages that merely group content by various categories, tags or by author but donÃ¢â¬â¢t actually have any content, you should not worry about it too much
Google doesn't recognize duplicate content within a single website as a problem. However, it will help Google to recognize your preferred pages if duplicated content on your site is limited. For archive pages, it is recommended that you show a snippet instead of the full article. This will help. There are other methods for dealing with duplicate content.