Issues restoring local cluster from backup operator

[gthibaultd]

Rancher Setup

Rancher version:
Rancher v2.9.2
Installation option (Docker install/Helm Chart):
Helm Chart on GKE cluster with 3 nodes
Kubernetes Version and Engine:
Client Version: v1.30.3
Kustomize Version: v5.0.4-0.20230601165947-6ce0bf390ce3
Server Version: v1.30.5-gke.1014001
Rancher-backup version: 104.0.1+up5.0.1

Describe the bug

When we try a rancher restoration from GCP S3 we always get this error :

ERRO[2024/10/10 14:27:16] Error restoring resource cluster-01 of type provisioning.cattle.io/v1, Resource=clusters: restoreResource: err updating resource admission webhook "rancher.cattle.io.clusters.provisioning.cattle.io" denied the request: creatorID annotation cannot be changed

To Reproduce

1 - Install rancher through Helm.
2 - Install app Backup on rancher markeplace.
3 - Add ubuntu node with rancher registration command.
4 - Create a s3 backup (works fine)
5 - Delete the local rancher to simulate a rancher server loss.
6 - Do step 1 & 2
7 - Create a restore with the fresh new file on s3 with the same access as the restore one. (https://ranchermanager.docs.rancher.com/how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-rancher)

Expected behavior

Have a Working rancher and have the ubuntu cluster attach itself automatically. (It was a kind of restore test)

Additionnal context

We systematically have this error. To restore it, we followed this procedure: https://ranchermanager.docs.rancher.com/how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-rancher
We have seen that this error exists in the documentation. (https://ranchermanager.docs.rancher.com/how-to-guides/new-user-guides/backup-restore-and-disaster-recovery/restore-rancher#known-issues) But if we have a large number of clusters, it's not practical to delete all the objects at once. Have we missed something for the restore to go smoothly?

[gthibaultd]

Find the issue. For this case we don't need to use Restore documentation but the Migration One.