Non-existent volumes attached to Instance.

Issue

• After a backup process with Commvault, the instance keeps the backed-up disks attached.

+-------------------------------------+------------------------------------------------------------------+
| Field                               | Value                                                            |
+-------------------------------------+------------------------------------------------------------------+
| OS-DCF:diskConfig                   | AUTO                                                             |
| OS-EXT-AZ:availability_zone         | nova                                                             |
| OS-EXT-SRV-ATTR:host                |compute-02.com                                    |
| OS-EXT-SRV-ATTR:hypervisor_hostname | compute-02.com                                    |
| OS-EXT-SRV-ATTR:instance_name       | instance-00000549                                                |
| OS-EXT-STS:power_state              | Running                                                          |
| OS-EXT-STS:task_state               | None                                                             |
| OS-EXT-STS:vm_state                 | active                                                           |
| OS-SRV-USG:launched_at              | 2021-11-25T17:34:18.000000                                       |
| OS-SRV-USG:terminated_at            | None                                                             |
| accessIPv4                          |                                                                  |
| accessIPv6                          |                                                                  |
| addresses                           | VL0100_backup_net=10.253.2.63; VL2883_osp_ext_api=10.253.202.226 |
| config_drive                        |                                                                  |
| created                             | 2021-11-25T17:32:44Z                                             |
| flavor                              | Small (bb9eab65-64b5-49db-9cd2-b5dac1a290f3)       |
| hostId                              | ca592a80a28c4a6a6e01aaa02a92e913740c348e2fc3e0e5df8c4717         |
| id                                  | 0c76bfda-192f-4964-b654-bbabdf91e2e4                             |
| image                               |                                                                  |
| key_name                            | None                                                             |
| name                                | instance                                             |
| progress                            | 0                                                                |
| project_id                          | 00be008b523a452fb1ae9089c256f2bd                                 |
| properties                          |                                                                  |
| security_groups                     | name='allow_all'                                                 |
|                                     | name='default'                                                   |
| status                              | ACTIVE                                                           |
| updated                             | 2021-11-25T17:34:18Z                                             |
| user_id                             | b27bc16fc36e4217b0d167de58ec7d4b                                 |
| volumes_attached                    | id='ef33e752-d4fd-4432-9555-6177f95f9fdb'                        |
|                                     | id='feea7814-b624-44e8-91f0-c6696cbeb214'                        |
|                                     | id='c9ee8fe3-a705-4c7c-aafb-87a6f91c7284'                        |
|                                     | id='d5ef0d53-98e7-4d4c-ad44-714b236a164e'                        |
|                                     | id='d9b4e5dc-9f17-4beb-a7e7-d3422dd1064e'                        |
|                                     | id='10f9f4af-670b-4e13-b3ed-00f8699e3048'                        |
+-------------------------------------+------------------------------------------------------------------+

• When consulting the disks, they do not exist but they are attached to the instance.

(overcloud) [stack@undercloud ~]$ openstack volume show 10f9f4af-670b-4e13-b3ed-00f8699e3048
No volume with a name or ID of '10f9f4af-670b-4e13-b3ed-00f8699e3048' exists.

• It seems to be a mismatch between the Cinder database and Nova database.