Clear the employee-email slug on form failure so it is not bypassed

app/controllers/claims_form_callbacks.rb

@@ -73,6 +73,11 @@ def check_your_answers_after_form_save_success
     create_and_save_claim_form
   end
 
+  def employee_email_after_form_save_failure
+    session[:slugs].delete("employee-email")
+    render_template_for_current_slug
+  end
+
   private
 
   def set_backlink_override_to_current_slug