diff --git a/app/controllers/managements_controller.rb b/app/controllers/managements_controller.rb
index 7a8e6495..a0aa01bc 100644
--- a/app/controllers/managements_controller.rb
+++ b/app/controllers/managements_controller.rb
@@ -1356,6 +1356,7 @@ end
       after_dep = Department.where(:school_id => params[:school_id], :name => department.name).first
       if after_dep
         UserExtensions.where(:school_id => params[:applied_id], :department_id => department.id).update_all(:department_id => after_dep.id)
+        department.apply_add_departments.destroy_all
         department.destroy
       else
         department.apply_add_departments.update_all(:school_id => params[:school_id])