some fix

kernel/FormModel.php

@@ -59,6 +59,16 @@ class FormModel
         return false;
     }
 
+    public function validateForUpdate(): bool
+    {
+        $res = $this->validator->validate($this->data, $this->rulesForUpdate());
+        if (!$res) {
+            return true;
+        }
+
+        return false;
+    }
+
     public function getErrors(): array
     {
         return $this->validator->getProcessedErrors();