diff --git a/app/views/admin/seminars/_form.html.erb b/app/views/admin/seminars/_form.html.erb
index dcf6be6..99172a4 100644
--- a/app/views/admin/seminars/_form.html.erb
+++ b/app/views/admin/seminars/_form.html.erb
@@ -273,9 +273,13 @@
         </thead>
         <tbody>
           <% @custom_set.each_with_index do |attr_custom,custom_index| %>
+            <%
+              seminar_signup_field = SeminarSignupField.where(id:attr_custom.seminar_signup_field_id).first 
+              next if seminar_signup_field.nil?
+            %>
             <tr>
               <td>
-                <%= SeminarSignupField.where(id:attr_custom.seminar_signup_field_id).first.title rescue '' %>
+                <%= seminar_signup_field.title rescue '' %>
               </td>
               <td>
                 <input type="hidden" class="field_set" name='<%= "seminar_main[seminar_signup_field_customs][#{custom_index}][hidden]" %>' value="false">
diff --git a/app/views/admin/seminars/_get_display_fields.html.erb b/app/views/admin/seminars/_get_display_fields.html.erb
index c1e9005..88f212e 100644
--- a/app/views/admin/seminars/_get_display_fields.html.erb
+++ b/app/views/admin/seminars/_get_display_fields.html.erb
@@ -22,7 +22,7 @@
            <% @field_name_translations << t(th) %>
         <% end %>
     <% end %>
-    <% if @seminar.seminar_signup_field_customs.count != 0 %>
+    <% if false #@seminar.seminar_signup_field_customs.count != 0 %>
         <% @seminar.seminar_signup_field_customs.each do |field_set| %>
             <% s = SeminarSignupField.where(id:field_set.seminar_signup_field_id).first %>
             <% title = s.title rescue '' %>
@@ -104,7 +104,7 @@
         <% end %>
     <% end %>
     <% seminar_signup_field_customs = SeminarSignupFieldCustom.all.map{|field_set| SeminarSignupField.where(id: field_set.seminar_signup_field_id).first}.select{|s| !s.nil?}.uniq{|s| s.key } %>
-    <% if seminar_signup_field_customs.count != 0 %>
+    <% if false #seminar_signup_field_customs.count != 0 %>
         <% seminar_signup_field_customs.each do |s| %>
             <% title = s.title rescue '' %>
             <% next if title.blank? %>