diff --git a/app/controllers/personal_books_controller.rb b/app/controllers/personal_books_controller.rb
index 48ac351..fd654f9 100644
--- a/app/controllers/personal_books_controller.rb
+++ b/app/controllers/personal_books_controller.rb
@@ -31,7 +31,6 @@ class PersonalBooksController < ApplicationController
       "book_title",
       "authors",
       "book_paper_type",
-      "book_title",
       "extracted_chapters",
       "publisher",
       "publish_date",