Fix bug.

app/controllers/application_forms_controller.rb

@@ -395,8 +395,9 @@ class ApplicationFormsController < ApplicationController
   def agree_link
     signup = ApplicationFormSignup.find(params[:id]) rescue nil
     stage_num = signup ? signup.get_stage_num(params[:cipher]) : nil
+    @error_message = nil
     if stage_num.nil?
-      render_404
+      @error_message = I18n.t('application_form.this_link_has_expired')
     else
       @type = params[:type]
       application_form = signup.application_form_main
@@ -444,7 +445,7 @@ class ApplicationFormsController < ApplicationController
     form_params = params[:application_form_signup]
     form_params_email = form_params[:email]
     form_params_main_id = form_params[:application_form_main_id]
-    @signup = ApplicationFormSignup.where(email: form_params_email, application_form_main_id: form_params_main_id ).first
+    @signup = nil #ApplicationFormSignup.where(email: form_params_email, application_form_main_id: form_params_main_id ).first
 
     @application_form = ApplicationFormMain.where(id: form_params_main_id).first
     @application_form_signup = ApplicationFormSignup.new(application_form_signup_params)
@@ -453,10 +454,6 @@ class ApplicationFormsController < ApplicationController
     else
       flag = false
     end
-    if @signup.present?
-      @signup.destroy
-      @signup = nil
-    end
     begin
     if gotcha_valid? || flag
       if @signup.blank? && @application_form_signup.save