Cannot rename nodeset in ECK - elasticsearch

Question

I am trying to rename a nodeset in my ECK cluster. Below is my Elastisearch cluster yaml:
apiVersion: elasticsearch.k8s.elastic.co/v1
kind: Elasticsearch
metadata:
name: elastic-test
spec:
version: 7.11.1
auth:
roles:
- secretName: elastic-roles-secret
fileRealm:
- secretName: elastic-filerealm-secret
nodeSets:
- name: default
count: 1
config:
node.store.allow_mmap: false
volumeClaimTemplates:
- metadata:
name: azure-pvc
spec:
storageClassName: ""
accessModes:
- ReadWriteMany
resources:
requests:
storage: 25Gi
volumeName: elasticsearch-azure-pv
podTemplate:
spec:
initContainers:
- name: install-plugins
command:
- sh
- -c
- |
bin/elasticsearch-plugin install --batch ingest-attachment
I want to change the nodeset name from default to default2.
However, the new pod created is stuck on Pending.
kubectl describe the new pod:
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 4m12s default-scheduler 0/3 nodes are available: 3 pod has unbound immediate PersistentVolumeClaims.
Warning FailedScheduling 4m12s default-scheduler 0/3 nodes are available: 3 pod has unbound immediate PersistentVolumeClaims.
Because both the old PVC was not deleted, the new PVC cannot bind to the same PV. AFAIK, for the intended behaviour the old PVC and pod should be deleted and the new pod and PVC can bind to the PV.
To provide some context, my deployment environment only allows me to apply yaml files (no running kubectl delete), and the goal is to add the ingest-attachment plugin. So I am trying to restart the existing pod by renaming it.