diff -r 6b6a884fa28a -r 85f4724e0c1d src/pyams_content/features/redirect/zmi/container.py
--- a/src/pyams_content/features/redirect/zmi/container.py	Mon Nov 12 16:56:15 2018 +0100
+++ b/src/pyams_content/features/redirect/zmi/container.py	Tue Nov 13 16:42:27 2018 +0100
@@ -12,49 +12,45 @@
 
 __docformat__ = 'restructuredtext'
 
-
-# import standard library
 import json
 
-# import interfaces
-from pyams_content.features.redirect.interfaces import IRedirectionManagerTarget, IRedirectionManager
+from pyramid.decorator import reify
+from pyramid.exceptions import NotFound
+from pyramid.view import view_config
+from z3c.form import button, field
+from z3c.table.column import GetAttrColumn
+from z3c.table.interfaces import IColumn, IValues
+from zope.interface import Interface
+from zope.schema import Bool, TextLine
+
+from pyams_content.features.redirect.interfaces import IRedirectionManager, IRedirectionManagerTarget
 from pyams_content.interfaces import MANAGE_SITE_ROOT_PERMISSION
+from pyams_content.zmi import pyams_content
+from pyams_form.form import AJAXAddForm
 from pyams_form.interfaces.form import IWidgetsSuffixViewletsManager
+from pyams_form.schema import CloseButton
 from pyams_i18n.interfaces import II18n
+from pyams_pagelet.pagelet import pagelet_config
 from pyams_sequence.interfaces import ISequentialIdInfo
-from pyams_skin.interfaces import IPageHeader, IUserSkinnable, IContentHelp
+from pyams_skin.help import ContentHelp
+from pyams_skin.interfaces import IContentHelp, IPageHeader, IUserSkinnable
 from pyams_skin.interfaces.viewlet import IToolbarViewletManager
 from pyams_skin.layer import IPyAMSLayer
-from pyams_zmi.interfaces.menu import ISiteManagementMenu
-from pyams_zmi.layer import IAdminLayer
-from z3c.table.interfaces import IValues, IColumn
-
-# import packages
-from pyams_content.zmi import pyams_content
-from pyams_form.form import AJAXAddForm
-from pyams_form.schema import CloseButton
-from pyams_pagelet.pagelet import pagelet_config
-from pyams_skin.help import ContentHelp
 from pyams_skin.page import DefaultPageHeaderAdapter
 from pyams_skin.skin import apply_skin
-from pyams_skin.table import BaseTable, SorterColumn, TrashColumn, I18nColumn, AttributeSwitcherColumn
+from pyams_skin.table import AttributeSwitcherColumn, BaseTable, I18nColumn, SorterColumn, TrashColumn
 from pyams_skin.viewlet.menu import MenuItem
 from pyams_skin.viewlet.toolbar import ToolbarAction
 from pyams_template.template import template_config
-from pyams_utils.adapter import adapter_config, ContextRequestViewAdapter
+from pyams_utils.adapter import ContextRequestViewAdapter, adapter_config
 from pyams_utils.fanstatic import get_resource_path
 from pyams_utils.request import copy_request
 from pyams_utils.url import absolute_url
-from pyams_viewlet.viewlet import viewlet_config, Viewlet
+from pyams_viewlet.viewlet import Viewlet, viewlet_config
 from pyams_zmi.form import AdminDialogAddForm
+from pyams_zmi.interfaces.menu import ISiteManagementMenu
+from pyams_zmi.layer import IAdminLayer
 from pyams_zmi.view import ContainerAdminView
-from pyramid.decorator import reify
-from pyramid.exceptions import NotFound
-from pyramid.view import view_config
-from z3c.form import field, button
-from z3c.table.column import GetAttrColumn
-from zope.interface import Interface
-from zope.schema import TextLine, Bool
 
 from pyams_content import _
 
@@ -224,8 +220,11 @@
     def getValue(self, obj):
         if obj.reference:
             target = obj.target
-            return '{0} ({1})'.format(II18n(target).query_attribute('title', request=self.request),
-                                      ISequentialIdInfo(target).get_short_oid())
+            if target is not None:
+                return '{0} ({1})'.format(II18n(target).query_attribute('title', request=self.request),
+                                          ISequentialIdInfo(target).get_short_oid())
+            else:
+                return self.request.localizer.translate(_("Internal reference: {0} (not found)")).format(obj.reference)
         else:
             return super(RedirectionsContainerTargetColumn, self).getValue(obj)