Hi, can anyone help me how to safely fix this error on one of the three prod rancher nodes? ,"msg":"request sent was ignored by remote peer due to cluster ID mismatch", However my rancher cluster is up and functioning . Not sure if the quorum is 2 for 3 nodes deployment.

By rancher nodes, do you mean the servers offering the rancher service or some cluster that is supported? In either case, can't you remove the server from the cluster and do a fresh import?

Not sure if the quorum is 2 for 3 nodes deployment.

kubectl get nodes -owide

should help show that if this is at the rke/k3s level. It might be helpful if you specify where exactly you're seeing that message.