Cluster Upgrade From 1.20 to 1.21 Is Getting Failed Due To ETCD Corruption.

--- /opt/pf9/pf9-kube/phases/etcd_configure.sh start at 2023-04-24 17:42:40 ---

[2023-04-24 17:42:40] Ensuring etcd data is stored on host

[2023-04-24 17:42:40] Error: No such object: etcd

[2023-04-24 17:42:40] Skipping; etcd container does not exist

--- /opt/pf9/pf9-kube/phases/etcd_run.sh start at 2023-04-24 17:42:40 ---

[2023-04-24 17:42:41] Node endpoint is 172.20.58.9

[2023-04-24 17:42:41] Deriving local etcd environment

[2023-04-24 17:42:41] Ensuring container 'etcd' is destroyed

[2023-04-24 17:42:41] 

[2023-04-24 17:42:56] {"level":"warn","ts":"2023-04-24T15:42:56.941Z","caller":"clientv3/retry_interceptor.go:62","msg":"retrying of unary invo

ker failed","target":"endpoint://client-57c1/localhost:4001","attempt":0,"error":"rpc error: code = DeadlineExc

eeded desc = latest balancer error: all SubConns are in TransientFailure, latest connection error: connection error: desc = \"transport: Error

while dialing dial tcp 127.0.0.1:4001: connect: connection refused\""}

[2023-04-24 17:42:56] https://localhost:4001 is unhealthy: failed to commit proposal: context deadline exceeded

[2023-04-24 17:42:56] Error: unhealthy cluster

[2023-04-24 17:42:57] Waiting for healthy etcd cluster.

[2023-04-24 17:43:12] {"level":"warn","ts":"2023-04-24T15:43:12.410Z","caller":"clientv3/retry_interceptor.go:62","msg":"retrying of unary invo

ker failed","target":"endpoint://client-444/localhost:4001","attempt":0,"error":"rpc error: code = DeadlineExc

eeded desc = latest balancer error: all SubConns are in TransientFailure, latest connection error: connection error: desc = \"transport: Error

while dialing dial tcp 127.0.0.1:4001: connect: connection refused\""}

[2023-04-24 17:43:12] https://localhost:4001 is unhealthy: failed to commit proposal: context deadline exceeded

[2023-04-24 17:43:12] Error: unhealthy cluster