NVP vProxy：VMバックアップが「Error received from vProxy ="-400: Request is missing list of virtual disks to backup.」

MM/DD/YYYY HH:MM:SS VM-NAME: Unable to start backup on vProxy 'VPROXY-NAME': Received an HTTP code: 400, libCURL message: "", vProxy message: "Error received from vProxy ="-400: Request is missing list of virtual disks to backup.". ", url: "https://VPROXY-NAME:9090/api/v1/BackupVmSessions", body: "{"Config":{"SessionId":"","LogTag":"@(#) Build number: 127","IdleTimeout":300,"LogLevel":"INFO","AcceptedLanguage":"en","TransportModeRequested":"hotadd:nbd","Parallelism":1,"UseCbt":true,"AutoEnableCbt":true,"AutoRepairCbt":true,"VimServerRef":{"HostName":"VCENTER-NAME","UserName":"USER-NAME","UserPassword":"****","TcpPort":0,"HypervisorMode":"vSphere"},"VmSpec":{"Name":"VM-NAME","VmMoref":"VM-MOREF","VirtualDisks":[],"IndependentDisks":[{"Label":"Hard disk 1","Key":2000},{"Label":"Hard disk 2","Key":2001}],"CustomFieldName":"Last EMC vProxy Backup","CustomFieldValue":"Backup Server=NSR-NAME, Policy=POLICY-NAME, Workflow=WORKFLOW-NAME, Action=ACTION-...
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MM/DD/YYYY HH:MM:SS Final Summary of VMs:
MM/DD/YYYY HH:MM:SS 0 canceled backups
MM/DD/YYYY HH:MM:SS 1 failed backups
MM/DD/YYYY HH:MM:SS 0 successful backups
MM/DD/YYYY HH:MM:SS 0 waiting backups
MM/DD/YYYY HH:MM:SS 0 running backups
MM/DD/YYYY HH:MM:SS 0 savesets output to next action
MM/DD/YYYY HH:MM:SS Action backup vmware-vproxy 'ACTION-NAME' with job id 185235 is exiting with status 'failed', exit code 1
MM/DD/YYYY HH:MM:SS Action has finished with failures.
MM/DD/YYYY HH:MM:SS Total number of static VM's selected: 1.
MM/DD/YYYY HH:MM:SS No excluded VM's are present.
MM/DD/YYYY HH:MM:SS Total number of merged VM's obtained from static and dynamic association: 1.

1. vSphere Web Clientにログインします。
2. 独立したディスクがあるVMに移動し、VMをシャットダウンします。
3. VMを右クリックし、 設定の編集 を選択します。
4. ハードディスク を展開し、 ディスクモード を独立 から 依存 に変更します。
5. VMのバックアップの電源を入れます。
6. VMの新しいバックアップを実行します。

https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vm_admin.doc/GUID-8B6174E6-36A8-42DA-ACF7-0DA4D8C5B084.html