--- a/src/pyams_security/zmi/plugin/group.py	Wed Apr 11 11:39:16 2018 +0200
+++ b/src/pyams_security/zmi/plugin/group.py	Wed Apr 11 11:40:14 2018 +0200
@@ -110,6 +110,8 @@
 class GroupsFolderEditForm(AdminDialogEditForm):
     """Groups folder plug-in edit form"""
 
+    prefix = 'groups_properties.'
+
     @property
     def title(self):
         return self.context.title
@@ -270,15 +272,19 @@
 
     def get_ajax_output(self, changes):
         translate = self.request.localizer.translate
-        return {'status': 'reload',
-                'location': absolute_url(self.context, self.request, 'search.html'),
-                'message': translate(_("Group was created successfully"))}
+        return {
+            'status': 'reload',
+            'location': absolute_url(self.context, self.request, 'search.html'),
+            'message': translate(_("Group was created successfully"))
+        }
 
 
 @pagelet_config(name='properties.html', context=ILocalGroup, layer=IPyAMSLayer, permission=VIEW_SYSTEM_PERMISSION)
 class LocalGroupEditForm(AdminDialogEditForm):
     """Local group edit form"""
 
+    prefix = 'group_properties.'
+
     @property
     def title(self):
         return self.context.title
@@ -306,7 +312,9 @@
 
     def get_ajax_output(self, changes):
         if 'title' in changes.get(ILocalGroup, ()):
-            return {'status': 'reload',
-                    'location': absolute_url(self.context.__parent__, self.request, 'search.html')}
+            return {
+                'status': 'reload',
+                'location': absolute_url(self.context.__parent__, self.request, 'search.html')
+            }
         else:
             return super(LocalGroupAJAXEditForm, self).get_ajax_output(changes)