Unable to update Vyos Rolling image - `File exists: '/mnt/installation/iso_src'`

I’m trying to update the VyOS image on my main box, and it’s giving me an error message about /mnt/installation/iso_src:

vyos@vyos:~$ add system image https://github.com/vyos/vyos-nightly-build/releases/download/2025.05.13-0019-rolling/vyos-2025.05.13-0019-rolling-generic-amd64.iso
Redirecting to https://objects.githubusercontent.com/github-production-release-asset-2e65be/674742659/ba948b93-9208-40a7-a99d-1e7022e1979d?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=releaseassetproduction%2F20250517%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20250517T074746Z&X-Amz-Expires=300&X-Amz-Signature=1ac494d4f125f01db011a2c07d9d30cf93ae649b8d99b9df8147c1c6dc371871&X-Amz-SignedHeaders=host&response-content-disposition=attachment%3B%20filename%3Dvyos-2025.05.13-0019-rolling-generic-amd64.iso&response-content-type=application%2Foctet-stream
The file is 598.000 MiB.
tput: unknown terminal "xterm-ghostty"
[#############################################################################################################################################################################] 100%
tput: unknown terminal "xterm-ghostty"
Validating signature
Signature is valid
Cleaning up
Unmounting target filesystems
Removing temporary files
Error: [Errno 17] File exists: '/mnt/installation/iso_src'

The current image is VyOS 1.5 - 2024-06-06 - and there’s nothing new installed, so I assume the above command aborted:

vyos@vyos:~$ show system image
Name                      Default boot    Running
------------------------  --------------  ---------
1.5-rolling-202406060020  Yes             Yes

There’s nothing that I can see under /mnt, but I’m not sure if that’s because the installation mounts it during the process?

The installer has been redone in the last year. Can you repeat the upgrade but do a reboot prior to „add system image“?

Side effects like from incomplete upgrades got recently addressed in the updater