How to modify existing storage class without impacting existing PVCs

[tribal wraith]

We want to add backends to Storagepool. however, existing PVCs should still be usable.

Here is the process to meet the requirement:

1. Delete existing StorageClass
2. Apply new StorageClass using the origin StorageClass name

We have test this method and it works,
Is there any recommendation or any document about this?

[rustic lodge]

I don't know that there is any documentation, but this is the way.