docs/models/VolumeProperties.md in ionoscloud-6.1.0 vs docs/models/VolumeProperties.md in ionoscloud-6.1.1

@@ -23,10 +23,11 @@
 | **device_number** | **Integer** | The Logical Unit Number of the storage volume. Null for volumes, not mounted to a VM. | [optional][readonly] |
 | **pci_slot** | **Integer** | The PCI slot number of the storage volume. Null for volumes, not mounted to a VM. | [optional][readonly] |
 | **backupunit_id** | **String** | The ID of the backup unit that the user has access to. The property is immutable and is only allowed to be set on creation of a new a volume. It is mandatory to provide either 'public image' or 'imageAlias' in conjunction with this property. | [optional] |
 | **user_data** | **String** | The cloud-init configuration for the volume as base64 encoded string. The property is immutable and is only allowed to be set on creation of a new a volume. It is mandatory to provide either 'public image' or 'imageAlias' that has cloud-init compatibility in conjunction with this property. | [optional] |
 | **boot_server** | **String** | The UUID of the attached server. | [optional][readonly] |
+| **boot_order** | **String** | Determines whether the volume will be used as a boot volume. Set to `NONE`, the volume will not be used as boot volume. Set to `PRIMARY`, the volume will be used as boot volume and all other volumes must be set to `NONE`. Set to `AUTO` or `null` requires all volumes to be set to `AUTO` or `null`; this will use the legacy behavior, which is to use the volume as a boot volume only if there are no other volumes or cdrom devices. | [optional][default to 'AUTO'] |
 
 ## Example
 
 ```ruby
 require 'ionoscloud'
@@ -50,9 +51,10 @@
   disc_virtio_hot_unplug: true,
   device_number: 3,
   pci_slot: 7,
   backupunit_id: 25f67991-0f51-4efc-a8ad-ef1fb31a481c,
   user_data: null,
-  boot_server: 25f67991-0f51-4efc-a8ad-ef1fb31a481c
+  boot_server: 25f67991-0f51-4efc-a8ad-ef1fb31a481c,
+  boot_order: AUTO
 )
 ```