diff --git a/djangocms_forms/cms_plugins.py b/djangocms_forms/cms_plugins.py
index 08a7f32..3d57c74 100644
--- a/djangocms_forms/cms_plugins.py
+++ b/djangocms_forms/cms_plugins.py
@@ -104,7 +104,10 @@ class FormPlugin(CMSPluginBase):
         context = super(FormPlugin, self).render(context, instance, placeholder)
         request = context['request']
         # print instance.plugin_reference
-        form_slug = "form-%d" % instance.plugin_reference.id
+        try:
+            form_slug = "form-%d" % instance.plugin_reference.id
+        except:
+            pass
         submission_instance = instance
 
         if request.session.get(form_slug, False):