Can not select External Mode

[teruz]

Hi. I hope to use Storage Cluster as External mode but I can not select it since it is grayed out.

Could you please suggest how to enable External button?

My environment

OCP Cluster: 4.6
OCS Operator: 4.6.7
getsebool: container_use_cephfs --> on

$ oc get all -n openshift-storage
NAME                                        READY   STATUS    RESTARTS   AGE
pod/noobaa-operator-6bbd49977-xpfs9         1/1     Running   0          45m
pod/ocs-metrics-exporter-7cc7577c95-5phrr   1/1     Running   0          45m
pod/ocs-operator-656dbc5d4c-xs9v8           1/1     Running   0          45m
pod/rook-ceph-operator-785dd4bd86-8tlvw     1/1     Running   0          45m

NAME                                   READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/noobaa-operator        1/1     1            1           45m
deployment.apps/ocs-metrics-exporter   1/1     1            1           45m
deployment.apps/ocs-operator           1/1     1            1           45m
deployment.apps/rook-ceph-operator     1/1     1            1           45m

NAME                                              DESIRED   CURRENT   READY   AGE
replicaset.apps/noobaa-operator-6bbd49977         1         1         1       45m
replicaset.apps/ocs-metrics-exporter-7cc7577c95   1         1         1       45m
replicaset.apps/ocs-operator-656dbc5d4c           1         1         1       45m
replicaset.apps/rook-ceph-operator-785dd4bd86     1         1         1       45m