Resize PVCs with no downtime

I'm trying to resize persistent volumes of a stateful set.
When I patched the first pvc, I got the following error :
```
Warning VolumeResizeFailed 56s (x9 over 5m15s) external-resizer cinder.csi.openstack.org resize volume ovh-managed-kubernetes-w81jmu-pvc-8b43d388-4f06-47b3-8386-xxxxxxx failed: rpc error: code = Internal desc = Could not resize volume "59b2b553-a2f9-44ff-89b3-xxxxxxxxxxx" to size 5: Expected HTTP response code 202] when accessing [POST https://volume.compute.gra5.cloud.ovh.net/v3/xxxxxxxxxxx/volumes/59b2b553-a2f9-44ff-89b3-xxxxxxxxxxxx/action], but got 406 instead
{"computeFault": {"message": "Version 3.42 is not supported by the API. Minimum is 3.0 and maximum is 3.15.", "code": 406}}
```
Your [guide on persistent volumes resizing says we have to scale to 0 replicas before, but this is just unacceptable as I need my database to stay up and running.

What is the way to get the volume to resize and achieve the following state ?
```
message: Waiting for user to (re-)start a pod to finish file
system resize of volume on node.
status: "True"
type: FileSystemResizePending

```