Clarification on the docs for PendingIntent.FLAG_CANCEL_CURRENT
<p>From the <a href="http://developer.android.com/reference/android/app/PendingIntent.html#FLAG_CANCEL_CURRENT" rel="nofollow">documentation of Pending Intent <code>FLAG_CANCEL_CURRENT</code></a> in Android:</p>

<blockquote>
  <p>by canceling the previous pending intent, this ensures that only entities given the new data will be able to launch it. If this assurance is not an issue, consider FLAG_UPDATE_CURRENT</p>
</blockquote>

<p>Can anyone explain what this line means?</p>
