title: What does this AWS error mean: The Code tab failed to save. Reason: Signature expired: X is now earlier than Y?
body: <p>When I uploaded the deployment package into AWS Lambda, and click <code>Test and Run</code>, I got the following error after a few minutes:</p>
  
  <pre><code>The Code tab failed to save. Reason: Signature expired: 20170327T111954Z is now earlier than 20170327T112115Z (20170327T112615Z - 5 min.)
  </code></pre>
  
  <p>It worked alright when I re-tried the uploaded though(without changing anything)</p>
  
  <p>But, I'm curious about what does this error mean?</p>