--- a/src/pyams_content/shared/site/zmi/link.py	Wed Apr 11 16:44:46 2018 +0200
+++ b/src/pyams_content/shared/site/zmi/link.py	Wed Apr 11 16:46:31 2018 +0200
@@ -31,8 +31,7 @@
 
 # import packages
 from pyams_content.shared.site.link import ContentLink
-from pyams_content.shared.site.zmi.container import SiteContainerTreeTable, SiteContainerTreeNameColumn, \
-    SiteContainerTreeSequenceColumn
+from pyams_content.shared.site.zmi.container import SiteContainerTreeTable, SiteContainerTreeNameColumn
 from pyams_content.shared.site.zmi.widget import SiteManagerFoldersSelectorFieldWidget
 from pyams_form.form import AJAXAddForm, AJAXEditForm
 from pyams_pagelet.pagelet import pagelet_config
@@ -137,10 +136,11 @@
 class ContentLinkPropertiesEditForm(AdminDialogEditForm):
     """Content link properties edit form"""
 
+    prefix = 'link_properties.'
+
     legend = _("Edit content link properties")
 
     fields = field.Fields(IContentLink).omit('__parent__', '__name__')
-
     ajax_handler = 'properties.json'
     edit_permission = MANAGE_CONTENT_PERMISSION