diff --git a/app/models/seminar_main.rb b/app/models/seminar_main.rb
index fa3392d..3332bd4 100644
--- a/app/models/seminar_main.rb
+++ b/app/models/seminar_main.rb
@@ -494,16 +494,17 @@ class SeminarMain
           approve_append = nil
           relations_fields.each do |k|
             belongs_to_class = clone_target.relations[k].class_name.constantize.relations.select{|k,v| v.macro == :belongs_to}.keys
-            has_many_class = clone_target.relations[k].class_name.constantize.relations.select{|k,v| v.macro == :has_many}.keys
+            has_many_class = clone_target.relations[k].class_name.constantize.relations.select{|k,v| v.macro.to_s.start_with?('has') }.keys
             if (belongs_to_class - tmp_singularize_relations_fields).count == 0
               other_has_many_class = (has_many_class - unsort_relation_keys)
               if other_has_many_class.count == 0
                 tmp_relations_fields << k
               else
+                org_k = k.to_s
                 result = other_has_many_class.map do |k| 
                   belongs_to_class = k.classify.constantize.relations.select{|kk,v| v.macro == :belongs_to}.keys
-                  has_many_class = k.classify.constantize.relations.select{|kk,v| v.macro == :has_many}.keys
-                  if (belongs_to_class - tmp_singularize_relations_fields).count == 0
+                  has_many_class = k.classify.constantize.relations.select{|kk,v| v.macro.to_s.start_with?('has') }.keys
+                  if (belongs_to_class - tmp_singularize_relations_fields - [org_k]).count == 0
                     true
                   else
                     fields_to_delete = fields_to_delete.concat(belongs_to_class)
@@ -546,7 +547,7 @@ class SeminarMain
         no_dup_flag = false
         if clone_target.relations[f].macro == :belongs_to || clone_target.relations[f].macro == :has_one
           no_dup_flag = new_object.send(f).present?
-        elsif clone_target.relations[f].macro == :has_many
+        elsif clone_target.relations[f].macro == :has_many || clone_target.relations[f].macro == :has_and_belongs_to_many
           no_dup_flag = new_object.send(f).to_a.count != 0
         elsif clone_target.relations[f].macro == :embeds_many #Fix localize fields
           if new_object.send(f).to_a.count != 0
@@ -597,7 +598,7 @@ class SeminarMain
             end
           end
           new_object.send("#{f}=",clone_relation)
-        elsif clone_target.relations[f].macro == :has_many
+        elsif clone_target.relations[f].macro == :has_many || clone_target.relations[f].macro == :has_and_belongs_to_many
           next if self.except_clone_relations.to_s.include?(f)
           clone_relations = []
           need_clone_relations = clone_target.send(f).asc(:_id).to_a
diff --git a/app/views/admin/seminars/_form.html.erb b/app/views/admin/seminars/_form.html.erb
index e0c6ecb..2e03105 100644
--- a/app/views/admin/seminars/_form.html.erb
+++ b/app/views/admin/seminars/_form.html.erb
@@ -337,8 +337,8 @@
                   <%= t('seminar.disable') %>
                 </td>
                 <td>
-                  <input type="hidden" class="field_set" name='<%= "seminar_main[seminar_email_sets][#{index1}][disabled]" %>' value="false">
-                  <%= check_box_tag("seminar_main[seminar_email_sets][#{index1}][disabled]", true ,@email_set[index1].disabled) %>
+                  <input type="hidden" class="field_set" name='<%= "seminar_main[seminar_email_sets_attributes][#{index1}][disabled]" %>' value="false">
+                  <%= check_box_tag("seminar_main[seminar_email_sets_attributes][#{index1}][disabled]", true ,@email_set[index1].disabled) %>
                 </td>
               </tr>
               <tr>
@@ -346,7 +346,7 @@
                   <%= t('seminar.email_title') %>
                 </td>
                 <td>
-                  <%= show_set_field(@email_set[index1],'seminar_email_sets',index1,'title','text_field') %>
+                  <%= show_set_field(@email_set[index1],'seminar_email_sets_attributes',index1,'title','text_field') %>
                 </td>
               </tr>
               <tr>
@@ -355,7 +355,7 @@
                 </td>
                 <td>
                   <div class="form-group">
-                    <%= show_set_field(@email_set[index1],'seminar_email_sets',index1,'content','text_area') %>
+                    <%= show_set_field(@email_set[index1],'seminar_email_sets_attributes',index1,'content','text_area') %>
                   </div>
                 </td>
               </tr>