title: Laravel Error stored in session
body: <p>I'm learning laravel (currently using 5.0.34 version) and I have a post request that when encounters an error enters this piece of code</p>
  
  <pre><code>$message = new MessageBag(["register" =&gt; Lang::get("errors.cant_checkout")]);
  return Redirect::back()-&gt;withErrors($message);
  </code></pre>
  
  <p>And the result is correct, he redirects to the same view and I can access the $error variable.
  The problem is <strong>sometimes</strong> the error keeps stored on session, so it will output the $error everytime I enter the page.
  How can this happen? Am I doing something wrong?</p>
  
  <p>Expected : after output first time, the $error gets off the Session</p>