fix

app/Http/Controllers/MetaController.php

@@ -55,7 +55,7 @@ class MetaController extends Controller
     public function create(Request $request)
     {
         $validator = Validator::make($request->all(), [
-            'patch_num' => 'required|max:16',
+            'patch_num' => 'required|alpha_num|max:16',
             'variety' => 'required|max:4',
             'variety_img' => 'required|url',
             'age' => 'required|max:4',