diff --git a/app/forms/main/config_logos.py b/app/forms/main/config_logos.py
index db69ae35..daea5de1 100644
--- a/app/forms/main/config_logos.py
+++ b/app/forms/main/config_logos.py
@@ -151,7 +151,7 @@ class AddLogoForm(FlaskForm):
         dept_id = dept_key_to_id(self.dept_key.data)
         if dept_id == GLOBAL:
             dept_id = None
-        if find_logo(logoname=name.data, dept_id=dept_id) is not None:
+        if find_logo(logoname=name.data, dept_id=dept_id, strict=True) is not None:
             raise validators.ValidationError("Un logo de même nom existe déjà")
 
     def select_action(self):
@@ -160,6 +160,14 @@ class AddLogoForm(FlaskForm):
                 return LogoInsert.build_action(self.data)
         return None
 
+    def errors(self):
+        if self.do_insert.data:
+            if self.name.errors:
+                return True
+            if self.upload.errors:
+                return True
+        return False
+
 
 class LogoForm(FlaskForm):
     """Embed both presentation of a logo (cf. template file configuration.html)
@@ -211,6 +219,11 @@ class LogoForm(FlaskForm):
             return LogoUpdate.build_action(self.data)
         return None
 
+    def errors(self):
+        if self.upload.data and self.upload.errors:
+            return True
+        return False
+
 
 class DeptForm(FlaskForm):
     dept_key = HiddenField()
@@ -244,6 +257,14 @@ class DeptForm(FlaskForm):
             return self
         return self.index.get(logoname, None)
 
+    def errors(self):
+        if self.add_logo.errors():
+            return True
+        for logo_form in self.logos:
+            if logo_form.errors():
+                return True
+        return False
+
 
 def _make_dept_id_name():
     """Cette section assure que tous les départements sont traités (y compris ceux qu'ont pas de logo au départ)
diff --git a/app/scodoc/sco_config_actions.py b/app/scodoc/sco_config_actions.py
index f6ea9637..e0e9133e 100644
--- a/app/scodoc/sco_config_actions.py
+++ b/app/scodoc/sco_config_actions.py
@@ -136,7 +136,7 @@ class LogoInsert(Action):
             parameters["dept_id"] = None
         if parameters["upload"] and parameters["name"]:
             logo = find_logo(
-                logoname=parameters["name"], dept_id=parameters["dept_key"]
+                logoname=parameters["name"], dept_id=parameters["dept_key"], strict=True
             )
             if logo is None:
                 return LogoInsert(parameters)
diff --git a/app/templates/config_logos.html b/app/templates/config_logos.html
index a4974ca7..04d4d266 100644
--- a/app/templates/config_logos.html
+++ b/app/templates/config_logos.html
@@ -20,20 +20,28 @@
 {% endmacro %}
 
 {% macro render_add_logo(add_logo_form) %}
-    <details>
-        <summary>
-            <h3>Ajouter un logo</h3>
-        </summary>
-        <div>
-            {{ render_field(add_logo_form.name) }}
-            {{ render_field(add_logo_form.upload) }}
-            {{ render_field(add_logo_form.do_insert, False, onSubmit="submit_form") }}
-        </div>
-    </details>
+    {% if add_logo_form.errors() %}
+        <details open>
+    {% else %}
+        <details>
+    {% endif %}
+            <summary>
+                <h3>Ajouter un logo</h3>
+            </summary>
+            <div>
+                {{ render_field(add_logo_form.name) }}
+                {{ render_field(add_logo_form.upload) }}
+                {{ render_field(add_logo_form.do_insert, False, onSubmit="submit_form") }}
+            </div>
+        </details>
 {% endmacro %}
 
 {% macro render_logo(dept_form, logo_form) %}
-    <details>
+    {% if logo_form.errors() %}
+        <details open>
+    {% else %}
+        <details>
+    {% endif %}
         {{ logo_form.hidden_tag() }}
         <summary>
             {% if logo_form.titre %}
@@ -97,9 +105,13 @@
     <div class="configuration_logo">
         <h1>Bibliothèque de logos</h1>
         {% for dept_entry in form.depts.entries %}
-            <details>
             {% set dept_form = dept_entry.form %}
             {{ dept_entry.form.hidden_tag() }}
+        {% if dept_form.errors() %}
+            <details open>
+        {% else %}
+            <details>
+        {% endif %}
             <summary>
                 {% if dept_entry.form.is_local() %}
                         <h2>Département {{ dept_form.dept_name.data }}</h2>