title: "Verifying transaction: failed" in Anaconda
body: <p>I am tried to do setup tensorflow in anaconda.
  I install Anaconda3-2019.03 which support pyhton3x. Now I learnt a lot and I could know that tensorflow doesn't works in Python 3.7.0 . That's why I update the Python version into Python 3.6.0 so that I can use tensorflow and I can install may be all packages but after all packages installation,
  I run a command in anaconda promots,</p>
  <pre><code>conda install python=3.6.0
  </code></pre>
  <p>but it shown an error and that is,</p>
  <pre><code>Preparing transaction: done
  Verifying transaction: failed
  </code></pre>
  <p><a href="https://i.stack.imgur.com/NXrSs.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/NXrSs.png" alt="Error screenshots" /></a></p>
  <p><strong>Note:</strong> How can i solve this issue?
  Please help me. Advanced thanks.</p>