[NSOperationQueue addOperation:]: operation is finished and cannot be enqueued'
<p><code>[NSOperationQueue addOperation:]:</code> operation is finished and cannot be enqueued', facing this issue, how to handle it , 
When I move my app to <code>background</code> and quit it then I want to resume uploading video/initiate new request on rebooting app and restarting but it keep on showing <code>[NSOperationQueue addOperation:]: operation is finished and cannot be enqueued'</code></p>

<p>Any help will be really appreciated.</p>