diff --git a/app/services/duplicate_course_service.rb b/app/services/duplicate_course_service.rb
index 27ae2f784..acff0a726 100644
--- a/app/services/duplicate_course_service.rb
+++ b/app/services/duplicate_course_service.rb
@@ -11,7 +11,7 @@ class DuplicateCourseService < ApplicationService
       @course = copy_course!
 
       copy_course_modules!
-      Rails.logger.info("###########second_category_list#{@second_category_list}")
+
       join_course!
 
       copy_homework_commons!
diff --git a/app/views/files/index.json.jbuilder b/app/views/files/index.json.jbuilder
index 81fa406dd..7fe3bf5b7 100644
--- a/app/views/files/index.json.jbuilder
+++ b/app/views/files/index.json.jbuilder
@@ -8,6 +8,7 @@ json.data do
   json.course_is_public @course.is_public?
   json.files do
     json.array! @attachments do |attachment|
+      json.is_history_file attachment.attachment_histories.count > 0 #是否有历史文件
       json.partial! "attachments/attachment", attachment: attachment
       json.author do
         json.partial! "users/user_simple", user: attachment.author