Veeam Agent: cannot update from 13.0.1.120 to 13.0.1.1009

[DatatoSecure]

Good day,

This is similar to this post veeam-agent-for-windows-f33/cannot-upda ... 00656.html

We can manually upgrade from 6.3.2.1302 to 13.0.1.120 or to 13.0.1.1009
But cannot update from 13.0.1.120 to 13.0.1.1009, it generates this error message:
Another version of this product is already installed.
Installation of this version cannot continue.

So on machines we tested with RTM & GA version: 13.0.1.120 (November 19, 2025), we have to uninstall the Agent before installing version 13.0.1.1009.
In one case a client is running PatchMyPC-HomeUpdater, so it has version 13.0.1.120.

Thank you.

[Mildur]

Hi Francois

Yes. It‘s documented.
Please review KB4811.

Best,
Fabian

[DatatoSecure]

Good day,

In order to unburden the forums, I think every error dialog box should have an error code. This way one could look it up and read the corresponding documentation.

Regards,
François

[e.kubla]

Hello Francois,

I have recently performed this in my lab and was able to successfully upgrade the Windows Agent. The steps I performed were the following...

Go to Inventory Menu -> Physical and Cloud Infrastructure -> Select the Protection Group containing the VM you wish to upgrade. In the right pane, select the VM, right click -> Agent -> Upgrade Agent.

I did receive the same message as you when trying to run the installer.

Thanks
Eric

[DatatoSecure]

Good day Eric,

Those were not VMs but laptops (Windows 11) and PCs (Windows 10).

Another error message we had was: “Cannot upgrade the backup agent. A newer version of the agent is not supported by the backup infrastructure” which made me look at our configurations.
Then last week, few days after my initial post, I was able to upgrade the Agent(s) via the VSPC, which I could not before. It may have had something to do with our Veeam ONE server (13.0.1) which had problems connecting to the VBR after we upgraded it from 12.3 to 13.0.1. So I removed the Veeam ONE software, rebooted and reinstalled a fresh copy.


Regards,
François