Laravel session id issue after up-gradation to 5.2 from 5.0

Issue is solved now. $middleware array in kernel.php not updated correctly. Updated middleware array is following.

protected $middleware = [
      \Illuminate\Foundation\Http\Middleware\CheckForMaintenanceMode::class,
      \Illuminate\Cookie\Middleware\EncryptCookies::class,
      \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
      \Illuminate\Session\Middleware\StartSession::class,
      \Illuminate\View\Middleware\ShareErrorsFromSession::class,
    ];