[BUG] restart pod, configuration is not persistent

[fm2022aa]

when I modify the postgres.conf， then restart， the conf is not persistent

why here has two same volume?

kubeblock: v0.8

here is my conf:

apiVersion: apps.kubeblocks.io/v1alpha1
kind: ClusterDefinition
metadata:
  name: cloudvector
  labels:
    {{- include "cloudvector.labels" . | nindent 4 }}
spec:
  connectionCredential:
    username: root
    password: "$(RANDOM_PASSWD)"
    endpoint: "$(SVC_FQDN):$(SVC_PORT_mysql)"
    host: "$(SVC_FQDN)"
    port: "$(SVC_PORT_mysql)"
  componentDefs:
    - name: cloudvector
      characterType: cloudvector
      workloadType: Stateful
      service:
        ports:
          - name: cloudvector
            port: 5432
            targetPort: cloudvector
      podSpec:
        containers:
          - name: cloudvector-container
            imagePullPolicy: IfNotPresent
            volumeMounts:
              - mountPath: /var/lib/postgresql
                name: data
            ports:
              - containerPort: 5432
                name: cloudvector
            env:
              - name: POSTGRES_PASSWORD
                valueFrom:
                  secretKeyRef:
                    name: $(CONN_CREDENTIAL_SECRET_NAME)
                    key: password
              - name: PGDATA
                value: /var/lib/postgresql/data

[fm2022aa]

I found my data is in emptydir not in pvc, can you tell me , how can I put data in the pvc instead of emptydir