Recently I found out from Webmaster Tools, one of my blogs has 154 duplicate title and 156 duplicate meta description. On closer look, both URLs lead to the same blog post. One is with the date followed by the blog title and the other begins with the blog title. Example:/2011/06/blog title.html /blog title/Is it something to do with the permalink settings? What should I do now? 
Duplicate title and meta description
google search console