diff --git a/app/controllers/admin/application_forms_controller.rb b/app/controllers/admin/application_forms_controller.rb
index dd89207..d4af843 100644
--- a/app/controllers/admin/application_forms_controller.rb
+++ b/app/controllers/admin/application_forms_controller.rb
@@ -468,14 +468,14 @@ class Admin::ApplicationFormsController < OrbitAdminController
         application_form_main_params['application_form_links_attributes'].delete(idx.to_s) if link['url'].blank?
       end
     end
-    application_form_signup_set_params = application_form_main_params['application_form_signup_field_sets']
-    application_form_email_sets_params = application_form_main_params['application_form_email_sets']
-    application_form_signup_field_customs_params = application_form_main_params["application_form_signup_field_customs"].to_h rescue {}
-    application_form_main_params["application_form_signup_field_customs"].to_h.each do |k,v|
+    application_form_signup_set_params = application_form_main_params['application_form_signup_field_sets_attributes']
+    application_form_email_sets_params = application_form_main_params['application_form_email_sets_attributes']
+    application_form_signup_field_customs_params = application_form_main_params["application_form_signup_field_customs_attributes"].to_h rescue {}
+    application_form_main_params["application_form_signup_field_customs_attributes"].to_h.each do |k,v|
       v.delete "title"
     end
-    application_form_main_params.delete(:application_form_signup_field_sets)
-    application_form_main_params.delete(:application_form_email_sets)
+    application_form_main_params.delete(:application_form_signup_field_sets_attributes)
+    application_form_main_params.delete(:application_form_email_sets_attributes)
     application_form = ApplicationFormMain.new(application_form_main_params)
     application_form.create_user_id = current_user.id
     application_form.update_user_id = current_user.id
@@ -541,8 +541,8 @@ class Admin::ApplicationFormsController < OrbitAdminController
       if @application_form_params.has_key?("title_translations")
         @application_form_params["organizer_id"] = nil if @application_form_params["organizer_id"].nil?
       end
-      if @application_form_params[:application_form_signup_fields]
-        @application_form_params[:application_form_signup_fields].each do |a|
+      if @application_form_params[:application_form_signup_fields_attributes]
+        @application_form_params[:application_form_signup_fields_attributes].each do |a|
           @field_name = 'application_form_main'
           field_status = a.last[:id].present?
           @attribute_field = ApplicationFormSignupField.add_application_form_signup_field(@application_form, a.last, a.last[:id], field_status)
@@ -552,8 +552,8 @@ class Admin::ApplicationFormsController < OrbitAdminController
         @application_form.application_form_signup_fields.each{|t| t.destroy if t["to_delete"] == true}
 
         redirect_to admin_application_forms_path and return
-      elsif @application_form_params[:application_form_submission_fields]
-        params[:application_form_main][:application_form_submission_fields].each do |a|
+      elsif @application_form_params[:application_form_submission_fields_attributes]
+        params[:application_form_main][:application_form_submission_fields_attributes].each do |a|
           @field_name = 'application_form_main'
           field_status = a.last[:id].present?
           @attribute_field = ApplicationFormSubmissionField.add_application_form_signup_field(@application_form, a.last, a.last[:id], field_status)
diff --git a/app/views/admin/application_forms/_form.html.erb b/app/views/admin/application_forms/_form.html.erb
index b093086..0551ced 100644
--- a/app/views/admin/application_forms/_form.html.erb
+++ b/app/views/admin/application_forms/_form.html.erb
@@ -117,15 +117,15 @@
                 <%= t("application_form_signup.#{attr_signup.field_name}") %>
               </td>
               <td>
-                <%= show_set_field(attr_signup,'application_form_signup_field_sets',signup_index,'name') %>
+                <%= show_set_field(attr_signup,'application_form_signup_field_sets_attributes',signup_index,'name') %>
               </td>
               <td>
-                <%= show_set_field(attr_signup,'application_form_signup_field_sets',signup_index,'placeholder') %>
+                <%= show_set_field(attr_signup,'application_form_signup_field_sets_attributes',signup_index,'placeholder') %>
               </td>
               <td>
-                <input type="hidden" class="field_name" name='<%= "application_form_main[application_form_signup_field_sets][#{signup_index}][field_name]" %>' value="<%= attr_signup.field_name %>">
-                <input type="hidden" class="field_set" name='<%= "application_form_main[application_form_signup_field_sets][#{signup_index}][disabled]" %>' value="false">
-                <%= check_box_tag("application_form_main[application_form_signup_field_sets][#{signup_index}][disabled]", true ,attr_signup.disabled) %>
+                <input type="hidden" class="field_name" name='<%= "application_form_main[application_form_signup_field_sets_attributes][#{signup_index}][field_name]" %>' value="<%= attr_signup.field_name %>">
+                <input type="hidden" class="field_set" name='<%= "application_form_main[application_form_signup_field_sets_attributes][#{signup_index}][disabled]" %>' value="false">
+                <%= check_box_tag("application_form_main[application_form_signup_field_sets_attributes][#{signup_index}][disabled]", true ,attr_signup.disabled) %>
               </td>
               <td style="padding-left: 1em;">
                 <% if attr_signup.field_name == 'email' %>
@@ -144,9 +144,9 @@
                   </script>
                 <% end %>
                 <% if false #attr_signup.field_name != 'recaptcha' %>
-                  <!-- <input type="hidden" class="field_set" name='<%= "application_form_main[application_form_signup_field_sets][#{signup_index}][hidden]" %>' value="false"> -->
-                  <%= hidden_field_tag("application_form_main[application_form_signup_field_sets][#{signup_index}][hidden]",attr_signup.hidden) %>
-                  <%#= check_box_tag("application_form_main[application_form_signup_field_sets][#{signup_index}][hidden]", true ,attr_signup.hidden) %>
+                  <!-- <input type="hidden" class="field_set" name='<%= "application_form_main[application_form_signup_field_sets_attributes][#{signup_index}][hidden]" %>' value="false"> -->
+                  <%= hidden_field_tag("application_form_main[application_form_signup_field_sets_attributes][#{signup_index}][hidden]",attr_signup.hidden) %>
+                  <%#= check_box_tag("application_form_main[application_form_signup_field_sets_attributes][#{signup_index}][hidden]", true ,attr_signup.hidden) %>
                 <% end %>
               </td>
             </tr>
@@ -169,13 +169,13 @@
                 <%= ApplicationFormSignupField.where(id:attr_custom.application_form_signup_field_id).first.title rescue '' %>
               </td>
               <td>
-                <input type="hidden" class="field_set" name='<%= "application_form_main[application_form_signup_field_customs][#{custom_index}][hidden]" %>' value="false">
-                <%= check_box_tag("application_form_main[application_form_signup_field_customs][#{custom_index}][hidden]", true ,attr_custom.hidden) %>
+                <input type="hidden" class="field_set" name='<%= "application_form_main[application_form_signup_field_customs_attributes][#{custom_index}][hidden]" %>' value="false">
+                <%= check_box_tag("application_form_main[application_form_signup_field_customs_attributes][#{custom_index}][hidden]", true ,attr_custom.hidden) %>
               </td>
               <% if !attr_custom.new_record? %>
-                <input for="field_0" id="application_form_main_application_form_signup_field_customs_<%= custom_index.to_s %>_id" name="application_form_main[application_form_signup_field_customs][<%= custom_index.to_s %>][id]" type="hidden" value="<%= attr_custom.id.to_s %>">
+                <input for="field_0" id="application_form_main_application_form_signup_field_customs_<%= custom_index.to_s %>_id" name="application_form_main[application_form_signup_field_customs_attributes][<%= custom_index.to_s %>][id]" type="hidden" value="<%= attr_custom.id.to_s %>">
               <% elsif f.object.copy_id.present? %>
-                <input name="application_form_main[application_form_signup_field_customs][<%= custom_index.to_s %>][title]" type="hidden" value="<%= attr_custom.application_form_signup_field.title.to_s %>">
+                <input name="application_form_main[application_form_signup_field_customs_attributes][<%= custom_index.to_s %>][title]" type="hidden" value="<%= attr_custom.application_form_signup_field.title.to_s %>">
               <% end %>
             </tr>
           <% end %>
@@ -217,8 +217,8 @@
                   <%= t('application_form.disable') %>
                 </td>
                 <td>
-                  <input type="hidden" class="field_set" name='<%= "application_form_main[application_form_email_sets][#{index1}][disabled]" %>' value="false">
-                  <%= check_box_tag("application_form_main[application_form_email_sets][#{index1}][disabled]", true ,@email_set[index1].disabled) %>
+                  <input type="hidden" class="field_set" name='<%= "application_form_main[application_form_email_sets_attributes][#{index1}][disabled]" %>' value="false">
+                  <%= check_box_tag("application_form_main[application_form_email_sets_attributes][#{index1}][disabled]", true ,@email_set[index1].disabled) %>
                 </td>
               </tr>
               <tr>
@@ -226,7 +226,7 @@
                   <%= t('application_form.email_title') %>
                 </td>
                 <td>
-                  <%= show_set_field(@email_set[index1],'application_form_email_sets',index1,'title','text_field') %>
+                  <%= show_set_field(@email_set[index1],'application_form_email_sets_attributes',index1,'title','text_field') %>
                 </td>
               </tr>
               <tr>
@@ -235,7 +235,7 @@
                 </td>
                 <td>
                   <div class="form-group">
-                    <%= show_set_field(@email_set[index1],'application_form_email_sets',index1,'content','text_area') %>
+                    <%= show_set_field(@email_set[index1],'application_form_email_sets_attributes',index1,'content','text_area') %>
                   </div>
                 </td>
               </tr>