When running upgrade from Aria Lifecycle manager , only primary node was upgraded , rest of the nodes are still in old version
Aria Operations for Logs
Aria Lifecycle Manager
Please run command to check Cassandra service status on all nodes
nodetool-no-pass status
If you see DN ( = Down Node) this mean cassandra service on that node is down
Start cassandra service
/usr/lib/loginsight/application/sbin/li-cassandra.sh --startnow --force
If nodetool-no-pass status showing now all nodes with status UN (= Up Node )
run steps from kb below