diff --git a/src/Libs/Model.php b/src/Libs/Model.php
index 3538ab2..9f611ab 100644
--- a/src/Libs/Model.php
+++ b/src/Libs/Model.php
@@ -250,7 +250,8 @@ class Model {
 
         foreach ($elem as $key => $value) {
             $index = array_search($key, $propertyNames);
-            if (is_numeric($index) && enum_exists($properties[$index]->getType()->getName()))
+            if (is_numeric($index) && isset($value) &&
+                enum_exists($properties[$index]->getType()->getName()))
                 $instance->$key = $properties[$index]->getType()->getName()::tryfrom($value);
             else
                 $instance->$key = $value;