有人知道如何在azure上实现terraform文档中提到的backup_protected_vm吗？

我正是在我想要删除虚拟机而不删除其备份的情况下。我完全看不出如何在代码中创建备份后立即修改此属性。

#Get Backup policy
data "azurerm_backup_policy_vm" "backup_policy" {
  name                = var.backup_policy_name
  resource_group_name = var.recovery_vault.resource_group_name
  recovery_vault_name = var.recovery_vault.name
}

# Add VM in Backup Recovery Vault
resource "azurerm_backup_protected_vm" "backup_vm" {
  resource_group_name = var.recovery_vault.resource_group_name
  recovery_vault_name = var.recovery_vault.name
  source_vm_id        = azurerm_windows_virtual_machine.vm.id
  backup_policy_id    = data.azurerm_backup_policy_vm.backup_policy.id

  depends_on = [
    azurerm_virtual_machine_extension.extension_diskencryption
  ]
}