diff --git a/app/controllers/graduation_topics_controller.rb b/app/controllers/graduation_topics_controller.rb
index 203f18b35..5160136e8 100644
--- a/app/controllers/graduation_topics_controller.rb
+++ b/app/controllers/graduation_topics_controller.rb
@@ -175,10 +175,10 @@ class GraduationTopicsController < ApplicationController
           teacher_group = TeacherCourseGroup.find_or_create_by!(:course_id => @course.id, :course_member_id => member.try(:id),
                                                                 :user_id => @graduation_topic.tea_id,
                                                                 :course_group_id => course_group.try(:id))
+          student_member = @course.course_members.where(:user_id => student_graduation_topic.user_id).first
+          student_member.update_attributes(:course_group_id => teacher_group.course_group_id) if student_member.present?
         end
       end
-      student_member = @course.course_members.where(:user_id => student_graduation_topic.user_id).first
-      student_member.update_attributes(:course_group_id => teacher_group.course_group_id) if student_member.present?
 
       student_graduation_topic.tidings.update_all(:status => 1)
       Tiding.create(:user_id => student_graduation_topic.user_id, :trigger_user_id => current_user.id,
diff --git a/app/controllers/hack_user_lastest_codes_controller.rb b/app/controllers/hack_user_lastest_codes_controller.rb
index 38238fea7..353833ee2 100644
--- a/app/controllers/hack_user_lastest_codes_controller.rb
+++ b/app/controllers/hack_user_lastest_codes_controller.rb
@@ -5,6 +5,7 @@ class HackUserLastestCodesController < ApplicationController
   before_action :update_user_hack_status, only: [:code_debug, :code_submit]
   before_action :require_auth_identity, only: [:add_notes]
   before_action :require_manager_identity, only: [:show, :update_code, :restore_initial_code, :sync_code]
+  skip_before_action :check_sign, only: [:listen_result]
 
   def show
     @my_hack.update_attribute(:submit_status, 0) if @my_hack.submit_status == 1