Image Validation Error

Hello , I'm new to Laravel , and I created a form with an Image to be saved , I've created a Request to validate the Image type but the Issue is when i Pick a .png file for example its gives validation Error.

-form

{!! Form::open(['method'=>'POST', 'action'=> 'AdminCategoriesController@store','files'=>true]) !!}

    <div class="form-group">
        {!! Form::label('name', 'Name:') !!}
        {!! Form::text('name', null, ['class'=>'form-control'])!!}
    </div>

    <div class="form-group">
        {!! Form::label('photo_id', 'Post Photo:') !!}
        {!! Form::file('photo_id', null, ['class'=>'form-control'])!!}
    </div>

    <div class="form-group">
        {!! Form::label('is_for_shop', 'Shop Related:') !!}
        {!! Form::select('is_for_shop', array(1=>'yes', 0=>'No'),1, ['class'=>'form-control'])!!}
    </div>

    <div class="form-group">
        {!! Form::submit('Create Category', ['class'=>'btn btn-primary']) !!}
    </div>
    {!! Form::close() !!}

-Controller

public function store(categoriesCreatRequest $request) { $input = $request->all();

    $user = Auth::user();

    $name =  $request->name;


    if($file =$request->file('photo_id')){ 

        $name = time().$file->getClientOriginalName(); 

        $file->move('images',$name); 

        $photo = Photo::create(['path'=>$name]);  

        $input['photo_id']=$photo->id; 

    }


   Category::create($input);

           return redirect('/admin/categories');
}

• Request

public function rules() { return [ // 'name' =>'required', 'photo_id' =>'required | mimes:jpeg,jpg,png | max:1000' ]; }

• uploaded File Asset 24.png