diff --git a/ci4/app/Config/Validation.php b/ci4/app/Config/Validation.php
index c097a621..1c8614bf 100755
--- a/ci4/app/Config/Validation.php
+++ b/ci4/app/Config/Validation.php
@@ -42,7 +42,14 @@ class Validation extends BaseConfig
     // --------------------------------------------------------------------
     // Rules
     // --------------------------------------------------------------------
-
+    /**
+     * Maquina duplicate validation
+     *
+     * @var array
+     */
+    public array $maquina_duplicate = [
+        "name" => "required|string"
+    ];
     /**
      * PapelImpresion duplicate validation
      *