diff --git a/admin/tool/lp/classes/persistent.php b/admin/tool/lp/classes/persistent.php
index 84b2c55afe9..3dedc8d95db 100644
--- a/admin/tool/lp/classes/persistent.php
+++ b/admin/tool/lp/classes/persistent.php
@@ -533,12 +533,12 @@ abstract class persistent {
     final public function validate() {
         global $CFG;
 
+        // Before validate hook.
+        $this->before_validate();
+
         // If this object has not been validated yet.
         if ($this->validated !== true) {
 
-            // Before validate hook.
-            $this->before_validate();
-
             $errors = array();
             $properties = static::properties_definition();
             foreach ($properties as $property => $definition) {