Laravel Inertia alway reload page

I use laravel inertia and vue js in my project. everything is working fine exclude for when i try to write file. when i write file it always reload pg. i already dd() to see where the place that make it happen. it is "File::put()" or "file_put_contents" .

if i use javascript fetch() or ajax for test it. it still make my page redirect infinitely. i think it have problem with middleware of inertia in kernel setup it in $middlewareGroups of "web" (i just guess) because this code is work fine in my other project (laravel only) i use ajax to update something in my file with laravel ( File::put() or file_put_contents in php).

here is my route: Route::get('/translate/kh', 'TranslateController@translateKh')->name('admin.translate.kh')->middleware('permission:translate_khmer,view');

here is my controller: public function updateNewWord(){ $file_path_en = resource_path('lang/en.json'); $dataEn = (array) json_decode(File::get($file_path_en));

    $file_path_kh = resource_path('lang/kh.json');
    $dataKh =  (array) json_decode(File::get($file_path_kh));

    $newDataKh = [];
    foreach($dataEn as $en_key => $en){
        if(array_key_exists($en_key, $dataKh)){
            $newDataKh[$en_key] = $dataKh[$en_key];
        } else {
            $newDataKh[$en_key] = '';
        }
    }

    $newDataKh = json_encode($newDataKh, JSON_UNESCAPED_UNICODE);
    return File::put($file_path_kh, $newDataKh);
}
public function translateKh(Request $r){
    if($this->ajaxRequest($r)){
        $file_path = resource_path('lang/kh.json');
        $data = json_decode(File::get($file_path));

        $dataTable = collect([]);
        foreach($data as $k => $d){
            $dataTable->push([
                'key' => $k,
                'word' => $d
            ]);
        }

        return DataTables::of($dataTable)->make(true);
    }
    if($this->updateNewWord()){
        return Inertia::render('backends/settings/translates/kh');
    };
}

please help me. thanks