title: cannot change number of tokens from 256 to 1
body: <p>I have a 3 node cassandra cluster and on my seed, the num_tokens is set to 256. I'm trying to set it to 1 or comment it out...but every time when i start cassandra, I get this error:</p>
  
  <pre><code>    ERROR 21:28:08 Fatal configuration error
  org.apache.cassandra.exceptions.ConfigurationException: Cannot change the number of tokens from 256 to 1
  </code></pre>
  
  <p>I also did a <code>rm -rf /var/lib/cassandra/*</code></p>
  
  <p>I also tried to go into <code>system.local</code> in cql and delete everything in the <code>tokens</code> field but I wasn't able to. How do I change this property?</p>