SDN pod in crashloopbackoff state after upgrading OpenShift cluster from 4.4 -> 4.5 with multiple value of clusterCIDR

Issue

• After upgrade from 4.4 to 4.5 the sdn-config ConfigMap has field (clusterCIDR: "") , an empty string and failed to parse.

• sdn pod logs

Aug 25 20:56:13 worker01.xxxx hyperkube[1424]: F0825 20:55:08.999094 2999122 proxy.go:112] Unable to configure local traffic detector: invalid CIDR address:

• sdn-config

apiVersion: kubeproxy.config.k8s.io/v1alpha1
bindAddress: 0.0.0.0
clientConnection:
  acceptContentTypes: ""
  burst: 0
  contentType: ""
  kubeconfig: ""
  qps: 0
clusterCIDR: ""       ---------------> empty string                  
configSyncPeriod: 0s
conntrack:
  maxPerCore: null
  min: null
  tcpCloseWaitTimeout: null
  tcpEstablishedTimeout: null
enableProfiling: false
healthzBindAddress: 0.0.0.0:10256
hostnameOverride: ""
iptables:
  masqueradeAll: false
  masqueradeBit: 0