diff --git a/_nav.html b/_nav.html
index dfdf9ef..e2e6170 100644
--- a/_nav.html
+++ b/_nav.html
@@ -60,9 +60,7 @@
 		<ul class="sub">
 			<li {{if $subcurrent == 'categories'}} class="current"{{/if}}><a href="{{$module.url}}categories/index.html">Catégories</a></li>
 			<li {{if $subcurrent == 'storage'}} class="current"{{/if}}><a href="{{$module.url}}storage/index.html">Lieux de stockage</a></li>
-{{*
 			<li {{if $subcurrent == 'typesES'}} class="current"{{/if}}><a href="{{$module.url}}config.html">Types d'entrées/sorties</a></li>
-*}}
 			<li {{if $subcurrent == 'divers'}} class="current"{{/if}}><a href="{{$module.url}}config/misc.html">Divers</a></li>
 		</ul>
 	{{/if}}
diff --git a/config.html b/config.html
index 9927c5e..f5bb3ec 100644
--- a/config.html
+++ b/config.html
@@ -12,14 +12,21 @@
 {{/if}}
 
 {{* lecture config (défaut ou enregistrée) *}}
-{{:include file="./_get_config.html" keep="config, directions"}}
+{{:include file="./_get_config.html" keep="config_defaut, config, directions"}}
+
+{{* interdire la modification et la suppression des types de mouvement prédéfinis *}}
+{{#foreach from=$directions key="direction"}}
+	{{:assign var="nature" from="config_defaut.%ss"|args:$direction}}
+	{{#foreach from=$nature item="elem"}}
+		{{:assign var="default_keys." value=$key}}
+	{{/foreach}}
+{{/foreach}}
 
 {{#foreach from=$directions key="direction" item="item"}}
 
 	{{* types de mouvements qui ne peuvent être supprimés *}}
 	{{#load type="movement" where="$$.direction='%s'"|args:$direction group="$$.operation"}}
-		{{:assign var="op_label" from="config.%s_nature.%s.label"|args:$direction:$operation}}
-		{{:assign var="locked_%ss."|args:$direction value=$op_label}}
+		{{:assign var="locked." value=$operation}}
 	{{/load}}
 
 	<h2 class="ruler">{{$item|ucfirst}}s</h2>
@@ -38,11 +45,12 @@
 					<td>{{$label}}</td>
 					<td>{{$type}}</td>
 					<td class="actions">
-						{{:assign var="locked" from="locked_%ss"|args:$direction}}
-						{{if ! $locked|has:$label}}
+						{{if ! $default_keys|has:$key && ! $locked|has:$key}}
 							{{:linkbutton label="Supprimer" shape="delete" href="config/delete_movement_type.html?dir=%s&op_key=%s"|args:$direction:$key target="_dialog"}}
 						{{/if}}
+						{{if ! $default_keys|has:$key}}
 							{{:linkbutton label="Modifier" shape="edit" href="config/modify_movement_type.html?dir=%s&op_key=%s"|args:$direction:$key target="_dialog"}}
+						{{/if}}
 					</td>
 				</tr>
 			{{/foreach}}
diff --git a/config/delete_movement_type.html b/config/delete_movement_type.html
index 4f0ddaa..801f821 100644
--- a/config/delete_movement_type.html
+++ b/config/delete_movement_type.html
@@ -10,16 +10,28 @@
 
 
 {{* lecture config (défaut ou enregistrée) *}}
-{{:include file="../_get_config.html" keep="config, directions"}}
+{{:include file="../_get_config.html" keep="config_defaut, config, directions"}}
+
+{{if ! $directions|has_key:$_GET.dir}}
+	{{:error message="Direction « %s » inconnue !"|args:$_GET.dir}}
+{{/if}}
+
+{{* interdire la suppression des types de mouvement prédéfinis *}}
+{{:assign var="nature" from="config_defaut.%ss"|args:$_GET.dir}}
+{{#foreach from=$nature item="elem"}}
+	{{:assign var="default_keys." value=$key}}
+{{/foreach}}
+{{if $default_keys|has:$_GET.op_key}}
+	{{:error message="Ce type de mouvement ne peut être supprimé"}}
+{{/if}}
 
 {{#form on="delete"}}
 	{{#foreach from=$directions key="direction"}}
 		{{:assign var="nature" from="config.%s_nature"|args:$direction}}
-		{{#foreach from=$nature key="key"}}
+		{{#foreach from=$nature key="key" item="elem"}}
 			{{if $_GET.dir == $direction && $key != $_GET.op_key || $_GET.dir != $direction}}
+				{{:assign var="%s_nature"|args:$direction value=$elem}}
 				{{:assign var="%s_nature.key"|args:$direction value=$key}}
-				{{:assign var="%s_nature.label"|args:$direction value=$label}}
-				{{:assign var="%s_nature.type"|args:$direction value=$type}}
 				{{:assign var="%s_natures."|args:$direction from="%s_nature"|args:$direction}}
 			{{/if}}
 		{{/foreach}}
diff --git a/config/modify_movement_type.html b/config/modify_movement_type.html
index 89d9970..5d99d4d 100644
--- a/config/modify_movement_type.html
+++ b/config/modify_movement_type.html
@@ -11,21 +11,34 @@
 {{* lecture config (défaut ou enregistrée) *}}
 {{:include file="../_get_config.html" keep="config, directions"}}
 
+{{if ! $directions|has_key:$_GET.dir}}
+	{{:error message="Direction « %s » inconnue !"|args:$_GET.dir}}
+{{/if}}
+
+{{* interdire la modification des types de mouvement prédéfinis *}}
+{{:assign var="nature" from="config_defaut.%ss"|args:$_GET.dir}}
+{{#foreach from=$nature item="elem"}}
+	{{:assign var="default_keys." value=$key}}
+{{/foreach}}
+{{if $default_keys|has:$_GET.op_key}}
+	{{:error message="Ce type de mouvement ne peut être modifié"}}
+{{/if}}
+
 {{#form on="save"}}
 	{{#foreach from=$directions key="direction"}}
 		{{:assign var="nature" from="config.%s_nature"|args:$direction}}
-		{{#foreach from=$nature key="key"}}
-			{{:assign var="%s_nature.key"|args:$direction value=$key}}
-			{{if $_GET.dir == $direction}}
-				{{if $key == $_GET.op_key}}
-					{{:assign var="%s_nature.label"|args:$direction value=$_POST.name|trim}}
-				{{else}}
-					{{:assign var="%s_nature.label"|args:$direction value=$label}}
-				{{/if}}
-			{{else}}
-				{{:assign var="%s_nature.label"|args:$direction value=$label}}
+		{{#foreach from=$nature key="key" item="elem"}}
+			{{if $_GET.dir == $direction && $_POST.name|trim|tolower == $elem.label|trim|tolower}}
+				{{:error message="Le libellé « %s » est déjà présent"|args:$_POST.name}}
 			{{/if}}
-			{{:assign var="%s_nature.type"|args:$direction value=$type}}
+			{{if $_GET.dir == $direction && $key == $_GET.op_key}}
+				{{:assign label=$_POST.name|trim}}
+			{{else}}
+				{{:assign label=$elem.label}}
+			{{/if}}
+			{{:assign var="%s_nature"|args:$direction value=$elem}}
+			{{:assign var="%s_nature.label"|args:$direction value=$label}}
+			{{:assign var="%s_nature.key"|args:$direction value=$key}}
 			{{:assign var="%s_natures."|args:$direction from="%s_nature"|args:$direction}}
 		{{/foreach}}
 	{{/foreach}}