I have s stateful set which status is showing CrashLoopBackOff. All other components are working fine. When I run kubectl -n magento get po I see pod status in CrashLoopBackOff, and logs show

Initializing database
2020-07-22T11:57:25.498116Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2020-07-22T11:57:25.499540Z 0 [ERROR] --initialize specified but the data directory has files in it. Aborting.
2020-07-22T11:57:25.499578Z 0 [ERROR] Aborting

This is the Kubernetes manifest:

apiVersion: v1
kind: Service
metadata:
  name: db
  labels:
    app: db
    k8s-app: magento
spec:
  selector:
    app: db
  ports:
  - name: db
    port: 3306

---

apiVersion: apps/v1
kind: StatefulSet
metadata:
  name: db
  namespace: magento
spec:
  selector:
    matchLabels:
      app: db
  serviceName: db
  template:
    metadata:
      labels:
        app: db
        k8s-app: magento
    spec:
      containers:
      - args:
        - --max_allowed_packet=134217728
        volumeMounts:
        - mountPath: /var/lib/mysql
          name: data
        env:
        - name: MYSQL_DATABASE
          valueFrom:
            configMapKeyRef:
              name: config
              key: DB_NAME
        - name: MYSQL_PASSWORD
          valueFrom:
            configMapKeyRef:
              name: config
              key: DB_PASS
        - name: MYSQL_USER
          valueFrom:
            configMapKeyRef:
              name: config
              key: DB_USER
        - name: MYSQL_ROOT_PASSWORD
          valueFrom:
            configMapKeyRef:
              name: config
              key: DB_ROOT_PASS
        image: percona:5.7
        name: db
        resources:
          requests:
            cpu: 100m
            memory: 256Mi
      restartPolicy: Always
  volumeClaimTemplates:
  - metadata:
      name: data
    spec:
      accessModes:
      - ReadWriteOnce
      resources:
        requests:
          storage: 10Gi