diff --git a/src/Entity/Group.php b/src/Entity/Group.php
index e0f9542..f76a812 100644
--- a/src/Entity/Group.php
+++ b/src/Entity/Group.php
@@ -2,6 +2,7 @@
 
 namespace App\Entity;
 
+use App\Validator;
 use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\Common\Collections\Collection;
 use Doctrine\ORM\Mapping as ORM;
@@ -25,6 +26,8 @@ class Group
     private $id;
 
     /**
+     * @Validator\Grouplabel()
+     * @Validator\Groupunique()
      * @ORM\Column(type="string", length=250, unique=true)
      */
     private $label;
diff --git a/src/Service/LdapService.php b/src/Service/LdapService.php
index 66186be..c3cfae2 100644
--- a/src/Service/LdapService.php
+++ b/src/Service/LdapService.php
@@ -193,22 +193,28 @@ class LdapService
     {
         $connection = $this->connect();
         if (false == $recursive) {
-            $removed = ldap_delete($connection, $dn);
-            if (!$removed) {
-                $this->ldapError();
-            }
-        } else {
-            // searching for sub entries
-            $sr = ldap_list($connection, $dn, 'ObjectClass=*', ['']);
-            $info = ldap_get_entries($connection, $sr);
-            for ($i = 0; $i < $info['count']; ++$i) {
-                $result = $this->deleteByDN($info[$i]['dn'], $recursive);
-                if (!$result) {
-                    return $result;
+            $ldapentrys = $this->searchdn($dn);
+            if (!empty($ldapentrys)) {
+                $removed = ldap_delete($connection, $dn);
+                if (!$removed) {
+                    $this->ldapError();
                 }
             }
+        } else {
+            $ldapentrys = $this->searchdn($dn);
+            if (!empty($ldapentrys)) {
+                // searching for sub entries
+                $sr = ldap_list($connection, $dn, 'ObjectClass=*', ['']);
+                $info = ldap_get_entries($connection, $sr);
+                for ($i = 0; $i < $info['count']; ++$i) {
+                    $result = $this->deleteByDN($info[$i]['dn'], $recursive);
+                    if (!$result) {
+                        return $result;
+                    }
+                }
 
-            return ldap_delete($connection, $dn);
+                return ldap_delete($connection, $dn);
+            }
         }
     }
 
diff --git a/src/Validator/Groupunique.php b/src/Validator/Groupunique.php
new file mode 100644
index 0000000..4f9b9aa
--- /dev/null
+++ b/src/Validator/Groupunique.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Validator;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * @Annotation
+ */
+class Groupunique extends Constraint
+{
+    public $messagegroup = 'Un groupe utilise déjà ce label';
+    public $messageniveau01 = 'Un niveau de rang 01 utilise déjà ce label';
+    public $messageniveau02 = 'Un niveau de rang 02 utilise déjà ce label';
+    public $messageniveau03 = 'Un niveau de rang 03 utilise déjà ce label';
+    public $messageniveau04 = 'Un niveau de rang 04 utilise déjà ce label';
+}
diff --git a/src/Validator/GroupuniqueValidator.php b/src/Validator/GroupuniqueValidator.php
new file mode 100644
index 0000000..248f97c
--- /dev/null
+++ b/src/Validator/GroupuniqueValidator.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Validator;
+
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+
+/**
+ * @Annotation
+ */
+class GroupuniqueValidator extends ConstraintValidator
+{
+    protected $em;
+
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->em = $em;
+    }
+
+    public function validate($value, Constraint $constraint)
+    {
+        $niveau = $this->em->getRepository("App\Entity\Niveau01")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau01);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau02")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau02);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau03")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau03);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau04")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau04);
+        }
+    }
+}
diff --git a/src/Validator/Niveau01unique.php b/src/Validator/Niveau01unique.php
index 94a1b64..45ca81e 100644
--- a/src/Validator/Niveau01unique.php
+++ b/src/Validator/Niveau01unique.php
@@ -10,5 +10,8 @@ use Symfony\Component\Validator\Constraint;
 class Niveau01unique extends Constraint
 {
     public $messagegroup = 'Un groupe utilise déjà ce label';
+    public $messageniveau01 = 'Un niveau de rang 01 utilise déjà ce label';
     public $messageniveau02 = 'Un niveau de rang 02 utilise déjà ce label';
+    public $messageniveau03 = 'Un niveau de rang 03 utilise déjà ce label';
+    public $messageniveau04 = 'Un niveau de rang 04 utilise déjà ce label';
 }
diff --git a/src/Validator/Niveau01uniqueValidator.php b/src/Validator/Niveau01uniqueValidator.php
index bcdde00..7ebd1b4 100644
--- a/src/Validator/Niveau01uniqueValidator.php
+++ b/src/Validator/Niveau01uniqueValidator.php
@@ -25,9 +25,19 @@ class Niveau01uniqueValidator extends ConstraintValidator
             $this->context->addViolation($constraint->messagegroup);
         }
 
-        $niveau02 = $this->em->getRepository("App\Entity\Niveau02")->findOneBy(['label' => $value]);
-        if ($niveau02) {
+        $niveau = $this->em->getRepository("App\Entity\Niveau02")->findOneBy(['label' => $value]);
+        if ($niveau) {
             $this->context->addViolation($constraint->messageniveau02);
         }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau03")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau03);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau04")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau04);
+        }
     }
 }
diff --git a/src/Validator/Niveau02unique.php b/src/Validator/Niveau02unique.php
index cd4fb5f..60e5bf2 100644
--- a/src/Validator/Niveau02unique.php
+++ b/src/Validator/Niveau02unique.php
@@ -11,4 +11,7 @@ class Niveau02unique extends Constraint
 {
     public $messagegroup = 'Un groupe utilise déjà ce label';
     public $messageniveau01 = 'Un niveau de rang 01 utilise déjà ce label';
+    public $messageniveau02 = 'Un niveau de rang 02 utilise déjà ce label';
+    public $messageniveau03 = 'Un niveau de rang 03 utilise déjà ce label';
+    public $messageniveau04 = 'Un niveau de rang 04 utilise déjà ce label';
 }
diff --git a/src/Validator/Niveau02uniqueValidator.php b/src/Validator/Niveau02uniqueValidator.php
index 6153b90..1821e05 100644
--- a/src/Validator/Niveau02uniqueValidator.php
+++ b/src/Validator/Niveau02uniqueValidator.php
@@ -25,9 +25,19 @@ class Niveau02uniqueValidator extends ConstraintValidator
             $this->context->addViolation($constraint->messagegroup);
         }
 
-        $niveau02 = $this->em->getRepository("App\Entity\Niveau01")->findOneBy(['label' => $value]);
-        if ($niveau02) {
+        $niveau = $this->em->getRepository("App\Entity\Niveau01")->findOneBy(['label' => $value]);
+        if ($niveau) {
             $this->context->addViolation($constraint->messageniveau01);
         }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau03")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau03);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau04")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau04);
+        }
     }
 }
diff --git a/src/Validator/Niveau03unique.php b/src/Validator/Niveau03unique.php
new file mode 100644
index 0000000..7943c26
--- /dev/null
+++ b/src/Validator/Niveau03unique.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Validator;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * @Annotation
+ */
+class Niveau03unique extends Constraint
+{
+    public $messagegroup = 'Un groupe utilise déjà ce label';
+    public $messageniveau01 = 'Un niveau de rang 01 utilise déjà ce label';
+    public $messageniveau02 = 'Un niveau de rang 02 utilise déjà ce label';
+    public $messageniveau03 = 'Un niveau de rang 03 utilise déjà ce label';
+    public $messageniveau04 = 'Un niveau de rang 04 utilise déjà ce label';
+}
diff --git a/src/Validator/Niveau03uniqueValidator.php b/src/Validator/Niveau03uniqueValidator.php
new file mode 100644
index 0000000..48bf050
--- /dev/null
+++ b/src/Validator/Niveau03uniqueValidator.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Validator;
+
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+
+/**
+ * @Annotation
+ */
+class Niveau03uniqueValidator extends ConstraintValidator
+{
+    protected $em;
+
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->em = $em;
+    }
+
+    public function validate($value, Constraint $constraint)
+    {
+        $group = $this->em->getRepository("App\Entity\Group")->findOneBy(['label' => $value]);
+        if ($group) {
+            $this->context->addViolation($constraint->messagegroup);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau01")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau01);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau02")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau02);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau04")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau04);
+        }
+    }
+}
diff --git a/src/Validator/Niveau04unique.php b/src/Validator/Niveau04unique.php
new file mode 100644
index 0000000..bdcf226
--- /dev/null
+++ b/src/Validator/Niveau04unique.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Validator;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * @Annotation
+ */
+class Niveau04unique extends Constraint
+{
+    public $messagegroup = 'Un groupe utilise déjà ce label';
+    public $messageniveau01 = 'Un niveau de rang 01 utilise déjà ce label';
+    public $messageniveau02 = 'Un niveau de rang 02 utilise déjà ce label';
+    public $messageniveau03 = 'Un niveau de rang 03 utilise déjà ce label';
+    public $messageniveau04 = 'Un niveau de rang 04 utilise déjà ce label';
+}
diff --git a/src/Validator/Niveau04uniqueValidator.php b/src/Validator/Niveau04uniqueValidator.php
new file mode 100644
index 0000000..70b54a0
--- /dev/null
+++ b/src/Validator/Niveau04uniqueValidator.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Validator;
+
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+
+/**
+ * @Annotation
+ */
+class Niveau04uniqueValidator extends ConstraintValidator
+{
+    protected $em;
+
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->em = $em;
+    }
+
+    public function validate($value, Constraint $constraint)
+    {
+        $group = $this->em->getRepository("App\Entity\Group")->findOneBy(['label' => $value]);
+        if ($group) {
+            $this->context->addViolation($constraint->messagegroup);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau01")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau01);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau02")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau02);
+        }
+
+        $niveau = $this->em->getRepository("App\Entity\Niveau03")->findOneBy(['label' => $value]);
+        if ($niveau) {
+            $this->context->addViolation($constraint->messageniveau04);
+        }
+    }
+}
diff --git a/templates/Niveau03/edit.html.twig b/templates/Niveau03/edit.html.twig
index dbca0f5..0c2bc86 100755
--- a/templates/Niveau03/edit.html.twig
+++ b/templates/Niveau03/edit.html.twig
@@ -66,7 +66,7 @@
 
     {% if auditUse and mode=="update" and (access=="admin" or access=="modo" or access=="audit") %}
         <div class="float-end" style="width:700px;max-width:100%">
-        {{ render(path("app_"~access~"_audit_renderid",{entityname:"Niveau02",entityid:niveau03.id})) }}
+        {{ render(path("app_"~access~"_audit_renderid",{entityname:"Niveau03",entityid:niveau03.id})) }}
         </div>
     {% endif %}      
 {{ form_end(form) }}
diff --git a/templates/Niveau04/edit.html.twig b/templates/Niveau04/edit.html.twig
index f3fcaad..f1f48f1 100755
--- a/templates/Niveau04/edit.html.twig
+++ b/templates/Niveau04/edit.html.twig
@@ -67,7 +67,7 @@
 
     {% if auditUse and mode=="update" and (access=="admin" or access=="modo" or access=="audit") %}
         <div class="float-end" style="width:700px;max-width:100%">
-        {{ render(path("app_"~access~"_audit_renderid",{entityname:"Niveau02",entityid:niveau03.id})) }}
+        {{ render(path("app_"~access~"_audit_renderid",{entityname:"Niveau04",entityid:niveau04.id})) }}
         </div>
     {% endif %}      
 {{ form_end(form) }}