diff --git a/inc/field/ldapselectfield.class.php b/inc/field/ldapselectfield.class.php
index adc3c1caa..e6e983a84 100644
--- a/inc/field/ldapselectfield.class.php
+++ b/inc/field/ldapselectfield.class.php
@@ -39,7 +39,6 @@
 use RuleRightParameter;
 use Glpi\Application\View\TemplateRenderer;
 use PluginFormcreatorAbstractField;
-use Toolbox;
 
 class LdapselectField extends SelectField
 {
@@ -187,53 +186,17 @@ public function prepareQuestionInputForSave($input) {
       }
 
       $ldap_values['ldap_attribute'] = $input['ldap_attribute'] ?? ($ldap_values['ldap_attribute'] ?? null);
-      $attribute = [];
       if (isset($ldap_values['ldap_attribute'])) {
          $ldap_dropdown = RuleRightParameter::getById((int) $ldap_values['ldap_attribute']);
          if (!($ldap_dropdown instanceof RuleRightParameter)) {
             return [];
          }
-         $attribute = [$ldap_dropdown->fields['value']];
       }
 
       if (isset($input['ldap_filter'])) {
          $input['ldap_filter'] = html_entity_decode($input['ldap_filter']);
       }
       $ldap_values['ldap_filter'] = $input['ldap_filter'] ?? ($ldap_values['ldap_filter'] ?? '');
-      set_error_handler([self::class, 'ldapErrorHandler'], E_WARNING);
-
-      try {
-         $cookie = '';
-         $ds = $config_ldap->connect();
-         if ($ds === false) {
-            Session::addMessageAfterRedirect(__('Connection to the directory failed.', 'formcreator'), false, ERROR);
-         }
-         ldap_set_option($ds, LDAP_OPT_PROTOCOL_VERSION, 3);
-         if (AuthLDAP::isLdapPageSizeAvailable($config_ldap)) {
-            $controls = [
-               [
-                  'oid'        => LDAP_CONTROL_PAGEDRESULTS,
-                  'iscritical' => true,
-                  'value'      => [
-                     'size'    => $config_ldap->fields['pagesize'],
-                     'cookie'  => $cookie
-                  ]
-               ]
-            ];
-            $result = ldap_search($ds, $config_ldap->fields['basedn'], $ldap_values->ldap_filter, $attribute, 0, -1, -1, LDAP_DEREF_NEVER, $controls);
-            ldap_parse_result($ds, $result, $errcode, $matcheddn, $errmsg, $referrals, $controls);
-            $cookie = $controls[LDAP_CONTROL_PAGEDRESULTS]['value']['cookie'] ?? '';
-         } else {
-            $result  = ldap_search($ds, $config_ldap->fields['basedn'], $ldap_values->ldap_filter, $attribute);
-         }
-         ldap_get_entries($ds, $result);
-      } catch (Exception $e) {
-         restore_error_handler();
-         trigger_error($e->getMessage(), E_USER_WARNING);
-         Session::addMessageAfterRedirect(__('Cannot recover LDAP informations!', 'formcreator'), false, ERROR);
-      }
-
-      restore_error_handler();
 
       $input['values'] = json_encode($ldap_values, JSON_UNESCAPED_UNICODE);
       unset($input['ldap_auth']);
diff --git a/tests/3-unit/GlpiPlugin/Formcreator/Field/LdapSelectField.php b/tests/3-unit/GlpiPlugin/Formcreator/Field/LdapSelectField.php
index d0692588a..57ab493cd 100644
--- a/tests/3-unit/GlpiPlugin/Formcreator/Field/LdapSelectField.php
+++ b/tests/3-unit/GlpiPlugin/Formcreator/Field/LdapSelectField.php
@@ -157,14 +157,14 @@ public function providerPrepareQuestionInputForSave() {
             ]),
             'input' => [
                'ldap_auth'      => $authLdap->getID(),
-               'ldap_filter'    => 'по', // Some cyrillic sample
+               'ldap_filter'    => 'по',
                'ldap_attribute' => '1',
             ],
             'expected' => [
                'values' => json_encode([
                   'ldap_auth'      => $authLdap->getID(),
+                  'ldap_attribute' => '1',
                   'ldap_filter'    => 'по',
-                  'ldap_attribute' => '',
                ], JSON_UNESCAPED_UNICODE),
             ]
          ],
@@ -180,14 +180,6 @@ public function providerPrepareQuestionInputForSave() {
     * @return void
     */
    public function testPrepareQuestionInputForSave(\PluginFormcreatorQuestion $question, array $input, array $expected) {
-      // Make the form private
-      $question = $this->getQuestion([
-         'ldap_auth' => $input['ldap_auth'],
-         'fieldtype' => 'ldapselect',
-         'ldap_filter' => '',
-         'ldap_attribute' => '',
-      ]);
-
       $instance = $this->newTestedInstance($question);
 
       $output = $instance->prepareQuestionInputForSave($input);