Laravel 5.4 put method strange behavior

This is my Routes:

/*
 * Photos route group
 */
Route::group(['prefix' => 'admin/photos', 'middleware' => 'auth'], function(){

    Route::get('/edit/{id}', 'PhotoController@edit')->name('photos.edit');

    Route::get('/new', 'PhotoController@create')->name('photos.new');

    Route::get('/', 'PhotoController@index')->name('photos.show');

    Route::post('/', 'PhotoController@store')->name('photos.save');

    Route::put('/update/{id}', 'PhotoController@update')->name('photos.update');

});

And this is my update method in photo model:

    public function update(Request $request, Photo $photo, $id)
    {
        //return [$request->all(), $photo::all()];
        return $id;
    }

And finally this is where my form will be created

            <form action="">
                
                

BUT when I use this configuration, laravel return methodNotAllowedException. when I change put method to post, again this will return same result, But when I change method to get the page will work fine.

I did reorder my routes in web.php file but the problem exists again.

Do you what is wrong in my code?

NOTE :

I have some other update methods in other models and these are OK, This problem occurs just for this model...

Thanks in Advance

via Chebli Mohamed