Re: Migrating Cassandra from 3.11.11 to 4.0.0 vs num_tokens

[Erick Ramirez]

It isn't possible to change the tokens on a node once it is already part of
the cluster. Cassandra won't allow you to do it because it will make the
data  already on disk unreadable. You'll need to either configure new nodes
or add a new DC. I've answered an identical question in
https://community.datastax.com/questions/12213/ where I've provided steps
for the 2 options. I hope to draft a runbook and get it published on the
Apache website in the coming days. Cheers!