CSI snapshot feature with velero - webhook "snapshot-validation-webhook.snapshot.storage.k8s.io" denied the request: Spec.SourceVolumeMode is immutable

[radhika-pr]

What steps did you take and what happened:
I have a cluster onpremise and the velero is installed with CSISnapshot feature to enable snapshot of Ontap -trident volumes. .

velero create backup test-pol-csi-snap-5 --include-namespaces test-policy --snapshot-move-data

The second time I run the command on same namespace, the backup creation fails with below error.

Operation Error:       error to expose snapshot: error to remove protect from volume snapshot content: error to update VolumeSnapshotContent snapcontent-968909c2-2a7e-4e44-9497-db1c34860b6f: admission webhook "snapshot-validation-webhook.snapshot.storage.k8s.io" denied the request: Spec.SourceVolumeMode is immutable but was changed from Filesystem to nil

What did you expect to happen:
Backup created without any issues.

If you are using velero v1.7.0+:
Please use velero debug --backup <backupname> --restore <restorename> to generate the support bundle, and attach to this issue, more options please refer to velero debug --help
bundle-2024-05-06-12-48-44.tar.gz

Environment:

• Velero version (use velero version): 1.13
• Velero features (use velero client config get features): EnableCSI
• Kubernetes version (use kubectl version): v1.28.3
• Kubernetes installer & version: Kubeadm v1.28.3
• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release): Redhat 8
• velero-plugin-for-csi:v0.7.0
• External snapshotter version 7.0.2 (helm 2.2.2)

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[blackpiglet]

This is already fixed.
Please try with v1.13.2.

The fixed PR is #7577.