diff --git a/core/Test/AutocompleteControllerTest.php b/core/Test/AutocompleteControllerTest.php
index 38a912a7ca7ea7cf84d12abc1af169a296fdf5ac..2e68b6d615504871b72588c01cc5a8d98f052c9e 100644
--- a/core/Test/AutocompleteControllerTest.php
+++ b/core/Test/AutocompleteControllerTest.php
@@ -50,7 +50,7 @@ class AutocompleteControllerTest extends TestCase
         $this->assertNotEmpty($responseBody);
 
         $this->assertSame('user', $responseBody[0]->type);
-        $this->assertInternalType('string', $responseBody[0]->id);
+        $this->assertInternalType('int', $responseBody[0]->id);
         $this->assertNotEmpty($responseBody[0]->id);
         $this->assertInternalType('string', $responseBody[0]->idToDisplay);
         $this->assertNotEmpty($responseBody[0]->idToDisplay);
diff --git a/src/app/entity/controllers/EntityController.php b/src/app/entity/controllers/EntityController.php
index 3c7bb27ba7fe059baeea9421cc5e5cee191bc8c1..e05b4ca0088ef59e85f005cff82ca537a13279cc 100644
--- a/src/app/entity/controllers/EntityController.php
+++ b/src/app/entity/controllers/EntityController.php
@@ -145,6 +145,7 @@ class EntityController
         $entity['instances'] = count($instances);
         $redirects = BasketModel::getGroupActionRedirect(['select' => [1], 'where' => ['entity_id = ?'], 'data' => [$aArgs['id']]]);
         $entity['redirects'] = count($redirects);
+        $entity['canAdminUsers'] = ServiceModel::hasService(['id' => 'admin_users', 'userId' => $GLOBALS['userId'], 'location' => 'apps', 'type' => 'admin']);
 
         return $response->withJson(['entity' => $entity]);
     }
diff --git a/src/app/user/controllers/UserController.php b/src/app/user/controllers/UserController.php
index 22b4f6f3377f142282ebcd790d9c55862ddbed0b..9d993de9aa82e258fc570531139627cbcfc790fa 100644
--- a/src/app/user/controllers/UserController.php
+++ b/src/app/user/controllers/UserController.php
@@ -633,7 +633,7 @@ class UserController
         if (empty($group)) {
             return $response->withStatus(400)->withJson(['errors' => 'Group not found']);
         } elseif (UserModel::hasGroup(['id' => $aArgs['id'], 'groupId' => $data['groupId']])) {
-            return $response->withStatus(400)->withJson(['errors' => 'User is already linked to this group']);
+            return $response->withStatus(400)->withJson(['errors' => _USER_ALREADY_LINK_GROUP]);
         }
         if (empty($data['role'])) {
             $data['role'] = '';
@@ -745,7 +745,7 @@ class UserController
         if (empty(EntityModel::getById(['entityId' => $data['entityId']]))) {
             return $response->withStatus(400)->withJson(['errors' => 'Entity not found']);
         } elseif (UserModel::hasEntity(['id' => $aArgs['id'], 'entityId' => $data['entityId']])) {
-            return $response->withStatus(400)->withJson(['errors' => 'User is already linked to this entity']);
+            return $response->withStatus(400)->withJson(['errors' => _USER_ALREADY_LINK_ENTITY]);
         }
         if (empty($data['role'])) {
             $data['role'] = '';
diff --git a/src/core/lang/lang-en.php b/src/core/lang/lang-en.php
index 83d8ea51deba1f89ac9423e410fc1ad36841db5f..2553deed59eb197a0ae40dcec4925233ffba80dd 100644
--- a/src/core/lang/lang-en.php
+++ b/src/core/lang/lang-en.php
@@ -75,6 +75,8 @@ define('_USER_GROUP_SUPPRESSION', 'Group deleted for user');
 define('_USER_ENTITY_CREATION', 'Entity added for user');
 define('_USER_ENTITY_MODIFICATION', 'Entity updated for user');
 define('_USER_ENTITY_SUPPRESSION', 'Entity deleted for user');
+define('_USER_ALREADY_LINK_GROUP', 'User is already linked to this group');
+define('_USER_ALREADY_LINK_ENTITY', 'User is already linked to this entity');
 define('_VISA_USER', 'For visa');
 define('_WRONG_FILE_TYPE', 'This type of file is not allowed');
 define('_CAN_NOT_MOVE_IN_CHILD_ENTITY', 'Parent entity must not be a subentity');
diff --git a/src/core/lang/lang-fr.php b/src/core/lang/lang-fr.php
index d8e3ad5979ff8547bc28cfbdab2adfca42189ed2..1d40889e155c4129e841f8f35a1326efbe170a20 100644
--- a/src/core/lang/lang-fr.php
+++ b/src/core/lang/lang-fr.php
@@ -75,6 +75,8 @@ define('_USER_GROUP_SUPPRESSION', 'Groupe supprimé pour utilisateur');
 define('_USER_ENTITY_CREATION', 'Entité ajoutée pour utilisateur');
 define('_USER_ENTITY_MODIFICATION', 'Entité modifiée pour utilisateur');
 define('_USER_ENTITY_SUPPRESSION', 'Entité supprimée pour utilisateur');
+define('_USER_ALREADY_LINK_GROUP', 'L\'utilisateur est déjà lié à ce groupe');
+define('_USER_ALREADY_LINK_ENTITY', 'L\'utilisateur est déjà lié à cette entité');
 define('_VISA_USER', 'Pour visa');
 define('_WRONG_FILE_TYPE', 'Ce type de fichier n\'est pas permis');
 define('_CAN_NOT_MOVE_IN_CHILD_ENTITY', 'L\'entité parente ne doit pas être dans une entité fille');