diff --git a/app/jobs/create_subject_course_student_job.rb b/app/jobs/create_subject_course_student_job.rb
index 38ff83024..a7b8cb8af 100644
--- a/app/jobs/create_subject_course_student_job.rb
+++ b/app/jobs/create_subject_course_student_job.rb
@@ -8,13 +8,15 @@ class CreateSubjectCourseStudentJob < ApplicationJob
     attrs = %i[course_id user_id role created_at updated_at]
     same_attrs = {course_id: course.id, role: 4}
 
+    Rails.logger.info("1:course.students.count:##{course.students.count}")
     CourseMember.bulk_insert(*attrs) do |worker|
       course.subject.subject_appointments.each do |app|
+        Rails.logger.info("##{course.students.where(user_id: app.user_id)}")
         next if course.students.where(user_id: app.user_id).any?
         worker.add same_attrs.merge(user_id: app.user_id)
       end
     end
-
+    Rails.logger.info("2:course.students.count:##{course.students.count}")
     course.subject.subject_appointments.destroy_all
   end
 end