title: CQLSH ProtocolError
body: <p>I have an error with cqlsh 
  when I type cqlsh to start cassandra shell where cassandra server is already started this error appears</p>
  
  <pre><code>Connection error: ('Unable to connect to any servers', {'127.0.0.1': ProtocolError("cql_version '3.3.1' is not supported by remote (w/ native protocol). Supported versions: [u'3.4.2']",)})
  </code></pre>
  
  <p>I also already installed cassandra-driver and 
  export CQLSH_NO_BUNDLED=true
  but nothing changes 
  could anyone have any idea to solve this ?!!
  my cassandra version is 3.6</p>