Temporal server down - Cassandra version compatibility check failed no connections were made when creating the session

Hi Team, We have installed Temporal server in Kubernetes from helm chart. We are using Cassandra.
Temporal server is goes down when I get the logs of the pod it shows an error like

Cassandra version compatibility check failed  no connections were made when creating the session

and

error : failed to connect to IP due to error keyspace XXXX does not exists

This is error I’m facing.
Do you have any ideas what could have caused this?

Which server version are you using (check server.image.tag in values.yaml).

Did you cassandra nodes restart or crash? Any logs you see on that side as well?
Do you use your own cassandra or one thats deployed via helm chart? Maybe check also logs of your admintools image as it might be failing on running the temporal-cassandra-tool create / update scripts?