title: Error - chaincode exists
body: <p>I'm getting this error when trying to start running my chaincode:</p>
  
  <p>Command: <code>composer network start -c adminCardLessor -n block-aviation-network -V 0.0.1 -A admin -C ./credentials/lessor/admin-pub.pem -f delete_me.card
  </code></p>
  
  <blockquote>
    <p>Error: Error trying to start business network. Error: No valid responses from any peers.
    Response from attempted peer comms was an error: Error: 2 UNKNOWN: chaincode error (status: 500, message: chaincode exists block-aviation-network)</p>
  </blockquote>
  
  <p>I successfully installed my chaincode on each of my peers but can seem to start it due to the above error...</p>
  
  <p>Does anyone have any experience with this error or how to resolve it?</p>