diff --git a/combo/locale/fr/LC_MESSAGES/django.po b/combo/locale/fr/LC_MESSAGES/django.po
index eab96fa0..73a4d7f2 100644
--- a/combo/locale/fr/LC_MESSAGES/django.po
+++ b/combo/locale/fr/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: combo 0\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-06-15 17:18+0000\n"
+"POT-Creation-Date: 2020-06-17 14:19+0000\n"
 "PO-Revision-Date: 2019-05-15 07:37+0200\n"
 "Last-Translator: Thomas NOËL <tnoel@entrouvert.com>\n"
 "Language: French\n"
@@ -227,8 +227,8 @@ msgstr "La durée minimale de réservation est %s."
 #: apps/gallery/models.py:30 apps/gallery/models.py:58 apps/lingo/models.py:657
 #: apps/lingo/models.py:773 apps/maps/models.py:288
 #: apps/newsletters/models.py:42 apps/wcs/models.py:64 apps/wcs/models.py:181
-#: data/models.py:140 data/models.py:1133 data/models.py:1253
-#: data/models.py:1349 data/models.py:1688 public/views.py:392
+#: data/models.py:141 data/models.py:1136 data/models.py:1256
+#: data/models.py:1352 data/models.py:1691 public/views.py:392
 msgid "Title"
 msgstr "Titre"
 
@@ -307,8 +307,8 @@ msgid "%s: "
 msgstr "%s : "
 
 #: apps/dataviz/models.py:43 apps/dataviz/models.py:81
-#: apps/notifications/models.py:76 apps/wcs/models.py:65 data/models.py:1134
-#: data/models.py:1350 data/models.py:1689
+#: apps/notifications/models.py:76 apps/wcs/models.py:65 data/models.py:1137
+#: data/models.py:1353 data/models.py:1692
 msgid "URL"
 msgstr "URL"
 
@@ -615,11 +615,11 @@ msgstr "Ajouter une image"
 msgid "Knowledge Base"
 msgstr "Base de connaissance"
 
-#: apps/kb/models.py:31 data/models.py:1110
+#: apps/kb/models.py:31 data/models.py:1113
 msgid "Root Page"
 msgstr "Page racine"
 
-#: apps/kb/models.py:33 data/models.py:1352
+#: apps/kb/models.py:33 data/models.py:1355
 msgid "Maximum number of entries"
 msgstr "Nombre maximum d’entrées"
 
@@ -698,7 +698,7 @@ msgstr "Service de paiement"
 msgid "Payment Service Options"
 msgstr "Options du service de paiement"
 
-#: apps/lingo/models.py:126 apps/wcs/models.py:182 data/models.py:146
+#: apps/lingo/models.py:126 apps/wcs/models.py:182 data/models.py:147
 msgid "Description"
 msgstr "Description"
 
@@ -839,7 +839,7 @@ msgstr "Transactions récentes"
 msgid "Basket Link"
 msgstr "Lien vers le panier"
 
-#: apps/lingo/models.py:658 data/models.py:1014 data/models.py:1019
+#: apps/lingo/models.py:658 data/models.py:1017 data/models.py:1022
 msgid "Text"
 msgstr "Texte"
 
@@ -1727,7 +1727,7 @@ msgstr "Icône du marqueur"
 msgid "Icon colour"
 msgstr "Couleur de l’icône"
 
-#: apps/maps/models.py:128 data/models.py:1693
+#: apps/maps/models.py:128 data/models.py:1696
 msgid "Cache duration"
 msgstr "Durée de cache"
 
@@ -2056,7 +2056,7 @@ msgstr "Activer la possibilité de s’abonner à des notifications « push »
 msgid "External URL"
 msgstr "URL externe"
 
-#: apps/pwa/models.py:109 data/models.py:1137
+#: apps/pwa/models.py:109 data/models.py:1140
 msgid "Internal link"
 msgstr "Lien interne"
 
@@ -2064,7 +2064,7 @@ msgstr "Lien interne"
 msgid "Icon"
 msgstr "Icône"
 
-#: apps/pwa/models.py:111 data/models.py:568
+#: apps/pwa/models.py:111 data/models.py:571
 msgid "Extra classes for CSS styling"
 msgstr "Classes supplémentaires pour le style par CSS"
 
@@ -2124,8 +2124,8 @@ msgstr ""
 "question et ses sous-pages."
 
 #: apps/search/manager_views.py:38 apps/search/manager_views.py:69
-#: apps/search/manager_views.py:94 manager/views.py:490 manager/views.py:664
-#: manager/views.py:707 manager/views.py:742
+#: apps/search/manager_views.py:94 manager/views.py:491 manager/views.py:665
+#: manager/views.py:708 manager/views.py:743
 #, python-format
 msgid "changed cell \"%s\""
 msgstr "modification à la cellule « %s »"
@@ -2319,7 +2319,7 @@ msgstr "Ordre manuel"
 msgid "Use drag and drop to reorder forms"
 msgstr "Vous pouvez utiliser les poignées ⣿ pour ordonner les démarches."
 
-#: apps/wcs/models.py:582 data/models.py:1254
+#: apps/wcs/models.py:582 data/models.py:1257
 msgid "Limit"
 msgstr "Limite"
 
@@ -2429,20 +2429,20 @@ msgstr "La vitesse de recherche par code de suivi est actuellement réduite."
 msgid "Use tracking code %s"
 msgstr "Utiliser le code de suivi %s"
 
-#: data/models.py:96
+#: data/models.py:97
 #, python-format
 msgid "syntax error: %s"
 msgstr "erreur de syntaxe : %s"
 
-#: data/models.py:141 data/models.py:567
+#: data/models.py:142 data/models.py:570
 msgid "Slug"
 msgstr "Slug"
 
-#: data/models.py:142
+#: data/models.py:143
 msgid "Sub Slug"
 msgstr "Expression de sous-page"
 
-#: data/models.py:143
+#: data/models.py:144
 msgid ""
 "Regular expression to create variadic subpages. Matching named groups are "
 "exposed as context variables."
@@ -2450,156 +2450,165 @@ msgstr ""
 "Expression rationnelle utilisée pour créer des variantes de sous-pages. Les "
 "groupes nommés seront exposés comme variables dans le contexte."
 
-#: data/models.py:147
+#: data/models.py:148
 msgid "Template"
 msgstr "Modèle de page"
 
-#: data/models.py:150
+#: data/models.py:151
 msgid "Exclude from navigation"
 msgstr "Exclure des menus"
 
-#: data/models.py:151
+#: data/models.py:152
 msgid "Redirect URL"
 msgstr "URL de redirection"
 
-#: data/models.py:153 data/models.py:358 data/models.py:570
+#: data/models.py:154 data/models.py:359 data/models.py:573
 msgid "Public"
 msgstr "Publique"
 
-#: data/models.py:154 data/models.py:576 manager/forms.py:143
+#: data/models.py:155 data/models.py:579 manager/forms.py:143
 msgid "Groups"
 msgstr "Groupes"
 
-#: data/models.py:158 settings.py:330 settings.py:335 settings.py:340
+#: data/models.py:159 settings.py:330 settings.py:335 settings.py:340
 msgid "Picture"
 msgstr "Image"
 
-#: data/models.py:263
+#: data/models.py:264
 #, python-format
 msgid "Unknown (%s)"
 msgstr "Inconnu (%s)"
 
-#: data/models.py:360 manager/templates/combo/manager_home.html:42
+#: data/models.py:361 manager/templates/combo/manager_home.html:42
 #: manager/templates/combo/page_view.html:169
 msgid "logged users"
 msgstr "utilisateurs connectés"
 
-#: data/models.py:361
+#: data/models.py:362
 #, python-format
 msgid "Private (%s)"
 msgstr "Privée (%s)"
 
-#: data/models.py:469
+#: data/models.py:416
+#, python-format
+msgid ""
+"Unknown parent for page \"%s\"; parent has been reset and page was excluded "
+"from navigation."
+msgstr ""
+"Page parente inconnue pour « %s », la page a été placée à la racine du "
+"site et a été marquée comme exclue des menus."
+
+#: data/models.py:472
 #, python-format
 msgid "Copy of %s"
 msgstr "Copie de %s"
 
-#: data/models.py:511
+#: data/models.py:514
 msgid "deletion"
 msgstr "suppression"
 
-#: data/models.py:575
+#: data/models.py:578
 msgid "Restrict to unlogged users"
 msgstr "Restreindre aux utilisateurs non connectés"
 
-#: data/models.py:595
+#: data/models.py:598
 msgid "Loading..."
 msgstr "Chargement…"
 
-#: data/models.py:667
+#: data/models.py:670
 #, python-format
 msgid "%(cell_label)s on page %(page_name)s (%(page_slug)s)"
 msgstr "%(cell_label)s sur la page %(page_name)s (%(page_slug)s)"
 
-#: data/models.py:1074
+#: data/models.py:1077
 msgid "Fortune"
 msgstr "Fortune du jour"
 
-#: data/models.py:1096
+#: data/models.py:1099
 msgid "Unlock Marker"
 msgstr "Marqueur de déblocage"
 
-#: data/models.py:1104
+#: data/models.py:1107
 msgid "Depth"
 msgstr "Profondeur"
 
-#: data/models.py:1106
+#: data/models.py:1109
 msgid "Initial Level"
 msgstr "Niveau initial"
 
-#: data/models.py:1107
+#: data/models.py:1110
 msgid "Same as page"
 msgstr "Identique à la page"
 
-#: data/models.py:1116
+#: data/models.py:1119
 msgid "Menu"
 msgstr "Menu"
 
-#: data/models.py:1138
+#: data/models.py:1141
 msgid "Anchor"
 msgstr "Ancre"
 
-#: data/models.py:1141
+#: data/models.py:1144
 msgid "add a link"
 msgstr "ajouter un lien"
 
-#: data/models.py:1142
+#: data/models.py:1145
 msgid "New link"
 msgstr "Nouveau lien"
 
-#: data/models.py:1143
+#: data/models.py:1146
 msgid "Edit link"
 msgstr "Modifier le lien"
 
-#: data/models.py:1147
+#: data/models.py:1150
 msgid "No link set"
 msgstr "Pas de lien défini"
 
-#: data/models.py:1148 data/models.py:1360 data/models.py:1478
+#: data/models.py:1151 data/models.py:1363 data/models.py:1481
 msgid "URL seems to unexist"
 msgstr "L’adresse ne semble pas exister"
 
-#: data/models.py:1149 data/models.py:1361 data/models.py:1479
+#: data/models.py:1152 data/models.py:1364 data/models.py:1482
 msgid "URL seems to be invalid"
 msgstr "L’adresse semble invalide"
 
-#: data/models.py:1153
+#: data/models.py:1156
 msgid "Link"
 msgstr "Lien"
 
-#: data/models.py:1262
+#: data/models.py:1265
 msgid "Invalid link"
 msgstr "Lien invalide"
 
-#: data/models.py:1266
+#: data/models.py:1269
 msgid "List of links"
 msgstr "Liste de liens"
 
-#: data/models.py:1359
+#: data/models.py:1362
 msgid "No URL set"
 msgstr "Pas d’adresse définie"
 
-#: data/models.py:1365
+#: data/models.py:1368
 msgid "RSS/Atom Feed"
 msgstr "Flux RSS/Atom"
 
-#: data/models.py:1417
+#: data/models.py:1420
 msgid "Same as parent"
 msgstr "Identique à la page parente"
 
-#: data/models.py:1690
+#: data/models.py:1693
 msgid "Display Template"
 msgstr "Gabarit d’affichage"
 
-#: data/models.py:1694
+#: data/models.py:1697
 msgid "Force asynchronous mode"
 msgstr "Forcer le mode asynchrone"
 
-#: data/models.py:1696
+#: data/models.py:1699
 msgid "Variable names"
 msgstr "Noms des variables"
 
-#: data/models.py:1697
+#: data/models.py:1700
 msgid ""
 "Comma separated list of query-string variables to be copied in template "
 "context"
@@ -2607,19 +2616,19 @@ msgstr ""
 "Liste des variables de la query-string à envoyer dans le contexte pour le "
 "template (noms séparés par des virgules)"
 
-#: data/models.py:1699
+#: data/models.py:1702
 msgid "Request timeout"
 msgstr "Expiration des requêtes"
 
-#: data/models.py:1700
+#: data/models.py:1703
 msgid "In seconds. Use 0 for default system timeout"
 msgstr "En secondes.  Utiliser 0 pour le délai d’expliration par défaut."
 
-#: data/models.py:1705
+#: data/models.py:1708
 msgid "JSON Prototype"
 msgstr "Prototype JSON"
 
-#: data/models.py:1732
+#: data/models.py:1735
 msgid "Extra"
 msgstr "Extra"
 
@@ -2955,48 +2964,48 @@ msgstr "S’identifier"
 msgid "File is not in the expected JSON format."
 msgstr "Le fichier n’est pas au format JSON attendu."
 
-#: manager/views.py:128
+#: manager/views.py:129
 msgid "Home"
 msgstr "Accueil"
 
-#: manager/views.py:185
+#: manager/views.py:186
 #, python-format
 msgid "switched template to %s"
 msgstr "changement de modèle vers %s"
 
-#: manager/views.py:210
+#: manager/views.py:211
 msgid "changed redirection"
 msgstr "changement de l’URL de redirection"
 
-#: manager/views.py:217
+#: manager/views.py:218
 msgid "changed navigation inclusion"
 msgstr "changement de l’inclusion dans les menus"
 
-#: manager/views.py:224
+#: manager/views.py:225
 msgid "changed slug"
 msgstr "changement du slug"
 
-#: manager/views.py:231
+#: manager/views.py:232
 msgid "changed description"
 msgstr "changement de la description"
 
-#: manager/views.py:238
+#: manager/views.py:239
 msgid "changed title"
 msgstr "changement du titre"
 
-#: manager/views.py:245
+#: manager/views.py:246
 msgid "changed visibility"
 msgstr "changement de la visibilité"
 
-#: manager/views.py:252
+#: manager/views.py:253
 msgid "changed picture"
 msgstr "changement de l’image"
 
-#: manager/views.py:264
+#: manager/views.py:265
 msgid "removed picture"
 msgstr "suppression de l’image"
 
-#: manager/views.py:392
+#: manager/views.py:393
 #, python-format
 msgid ""
 "Page %s has been duplicated, it has been marked as excluded from navigation."
@@ -3004,41 +3013,41 @@ msgstr ""
 "La page « %s » a été dupliquée, la nouvelle page a été marquée comme exclue "
 "des menus."
 
-#: manager/views.py:394
+#: manager/views.py:395
 #, python-format
 msgid "Page %s has been duplicated."
 msgstr "La page « %s » a été dupliquée."
 
-#: manager/views.py:429
+#: manager/views.py:430
 #, python-format
 msgid "restored snapshot from %s"
 msgstr "restauration de l’instantané du %s"
 
-#: manager/views.py:431
+#: manager/views.py:432
 #, python-format
 msgid "Snapshot from %s has been restored."
 msgstr "L’instantané du %s a été restauré."
 
-#: manager/views.py:450
+#: manager/views.py:451
 #, python-format
 msgid "added cell \"%s\""
 msgstr "ajout d’une cellule « %s »"
 
-#: manager/views.py:509
+#: manager/views.py:510
 #, python-format
 msgid "removed cell \"%s\""
 msgstr "suppression de la cellule « %s »"
 
-#: manager/views.py:559 manager/views.py:774
+#: manager/views.py:560 manager/views.py:775
 msgid "reordered cells"
 msgstr "modification de l’ordre des cellules"
 
-#: manager/views.py:607
+#: manager/views.py:608
 #, python-format
 msgid "Editing \"%(site_title)s\""
 msgstr "Édition « %(site_title)s »"
 
-#: manager/views.py:609
+#: manager/views.py:610
 msgid "Content Management"
 msgstr "Gestion de contenu"