diff --git a/src/includes/class/class.LSldapObject.php b/src/includes/class/class.LSldapObject.php
index 2a1acfbd..ff385a19 100644
--- a/src/includes/class/class.LSldapObject.php
+++ b/src/includes/class/class.LSldapObject.php
@@ -583,14 +583,14 @@ class LSldapObject extends LSlog_staticLoggerClass {
     // Validate attribute values
     if ($justCheck) {
       self :: log_trace(
-        "validateAttrData(".$LSform->idForm.", ".$attr->name."): ".
+        "validateAttrData(".($LSform?$LSform->idForm:null).", {$attr->name}): ".
         "just check mode: do not validate attribute data using LDAP search"
       );
     }
     else {
       foreach($attr -> getConfig('validation', array(), 'array') as $test) {
         self :: log_trace(
-          "validateAttrData(".$LSform->idForm.", ".$attr->name."): ".
+          "validateAttrData(".($LSform?$LSform->idForm:null).", {$attr->name}): ".
           "run validation with following config:\n".varDump($test)
         );
 
@@ -636,12 +636,23 @@ class LSldapObject extends LSlog_staticLoggerClass {
 
             // Handle base_dn parameter
             $sbasedn = LSconfig :: get('basedn', null, 'string', $test);
-            if ($sbasedn)
+            if ($sbasedn) {
+              if ($sbasedn == "%{dn}" && $LSform && $LSform -> idForm == 'create') {
+                self :: log_info(
+                  "validateAttrData({$LSform->idForm}, {$attr->name}): Ignore attribute ".
+                  "validation with filter '{$sfilter->asString()}' on the current object it self ".
+                  "(base DN=$sbasedn) in create form"
+                );
+                continue;
+              }
               $sbasedn = $this -> getFData($sbasedn);
+            }
 
             // If except_current_object (and not create form), list matching objets to exclude current one
-            if (LSconfig :: get('except_current_object', false, 'bool', $test) &&
-                $LSform -> idForm != 'create') {
+            if (
+              LSconfig :: get('except_current_object', false, 'bool', $test)
+              && (!$LSform || $LSform -> idForm != 'create')
+            ) {
               $sret = LSldap :: search($sfilter, $sbasedn, $sparams);
               $dn = $this->getDn();
               $ret = 0;
@@ -667,7 +678,7 @@ class LSldapObject extends LSlog_staticLoggerClass {
               ) {
               $retval = false;
               self :: log_warning(
-                "validateAttrData(".$LSform->idForm.", ".$attr->name."): ".
+                "validateAttrData(".($LSform?$LSform->idForm:null).", {$attr->name}): ".
                 "validation with LDAP search on base DN='$sbasedn' and ".
                 "filter='".($sfilter?$sfilter->as_string():null)."' error ($ret object(s) found)"
               );
@@ -676,7 +687,7 @@ class LSldapObject extends LSlog_staticLoggerClass {
             }
             else {
               self :: log_trace(
-                "validateAttrData(".$LSform->idForm.", ".$attr->name."): ".
+                "validateAttrData(".($LSform?$LSform->idForm:null).", {$attr->name}): ".
                 "validation with LDAP search on base DN='$sbasedn' and ".
                 "filter='".($sfilter?$sfilter->as_string():null)."' success ($ret object(s) found)"
               );
@@ -721,7 +732,7 @@ class LSldapObject extends LSlog_staticLoggerClass {
     $dependsAttrs = $attr->getDependsAttrs();
     if (empty($dependsAttrs)) {
       self :: log_trace(
-        "validateAttrData(".$LSform->idForm.", ".$attr->name."): ".
+        "validateAttrData(".($LSform?$LSform->idForm:null).", {$attr->name}): ".
         "no dependent attribute"
       );
     }
@@ -735,7 +746,7 @@ class LSldapObject extends LSlog_staticLoggerClass {
           continue;
         }
         self :: log_debug(
-          "validateAttrData(".$LSform->idForm.", ".$attr->name."): ".
+          "validateAttrData(".($LSform?$LSform->idForm:null).", {$attr->name}): ".
           'Attribute '.$attr->name.' updated: generate new value for attribute '.$dependAttr
         );
         if($this -> attrs[$dependAttr] -> canBeGenerated()) {