Add a condition to check if there is a field (#4451)

Resources/views/CRUD/base_edit_form_macro.html.twig

@@ -17,7 +17,7 @@
                             <p>{{ form_group.description|raw }}</p>
                         {% endif %}
 
-                        {% for field_name in form_group.fields if admin.formfielddescriptions[field_name] is defined %}
+                        {% for field_name in form_group.fields if form[field_name] is defined %}
                             {{ form_row(form[field_name])}}
                         {% else %}
                             <em>{{ 'message_form_group_empty'|trans({}, 'SonataAdminBundle') }}</em>