This update to the Proxmox Virtual Environment Plug-In for Veeam Backup & Replication requires:

• Veeam Backup & Replication build 12.2.0.334
  You can check the build number in the Veeam Backup & Replication Console's Main Menu (≡) under Help > About.
  
• Proxmox Virtual Environment Plug-In for Veeam Backup & Replication build 12.1.0.313
  You can check the current build number within the installed applications list.

After the updated Proxmox Virtual Environment Plug-In is installed, the Plug-In build number will be 12.1.1.1024.

• Backup jobs and other activities fail to establish a network connection to the Veeam Backup Server when the Veeam Backup Server has disconnected network interfaces.
• In certain circumstances, when processing a virtual disk with an intense I/O load, the backup job may read and store a later state of some disk blocks instead of their state at the time of the snapshot. This issue applies only to jobs using the Hot Add backup mode.
  
• The loss of the most recent incremental restore point may cause the next run of the backup job to generate an incomplete incremental restore point.

• After a failed incremental backup run, the next run of that backup job will perform a full read of the entire protected disk to identify changed blocks reliably. This will not affect incremental backup size as only those identified changed blocks will be stored in the incremental restore point.
  
• During the first run of each backup job after applying this update, each job will automatically perform a full disk read to identify the actual state of all disk blocks reliably. This will not affect incremental backup size; only differences will be stored in the incremental restore point.