diff --git a/app/models/attachment.rb b/app/models/attachment.rb
index 9c60317bd..8b7034ab9 100644
--- a/app/models/attachment.rb
+++ b/app/models/attachment.rb
@@ -98,7 +98,7 @@ class Attachment < ApplicationRecord
 
   def become_history
     history = self.attachment_histories.first
-    new_attachment_history = AttachmentHistory.new(self.attributes.except("id", "resource_bank_id", "unified_setting", "course_second_category_id").merge(
+    new_attachment_history = AttachmentHistory.new(self.attributes.except("id", "resource_bank_id", "unified_setting", "course_second_category_id", "delay_publish").merge(
         attachment_id: self.id,
         version: history.nil? ? 1 :  history.version + 1,
     ))
@@ -106,7 +106,7 @@ class Attachment < ApplicationRecord
   end
 
   def copy_attributes_from_new_attachment(new_attachment)
-    self.attributes = new_attachment.attributes.dup.except("id","container_id","container_type","is_public","downloads", "quotes",'is_publish','publish_time')
+    self.attributes = new_attachment.attributes.dup.except("id","container_id","container_type","is_public","downloads", "quotes",'is_publish','publish_time', "delay_publish")
   end
 
   def set_public(is_public)