Update fails if the system does not have the system options kernel xxx https://github.com/vyos/vyos-1x/blob/a551fa45573ef57858904773d4bcc99dbf553b19/src/op_mode/image_installer.py#L496-L497
vyos@r14:~$ add system image vyos-2025.07.28-0022-rolling-generic-amd64.iso Validating image compatibility Validating image checksums What would you like to name this image? (Default: 2025.07.28-0022-rolling) Would you like to set the new image as the default one for boot? [Y/n] An active configuration was found. Would you like to copy it to the new image? [Y/n] Copying configuration directory Would you like to copy SSH host keys? [Y/n] Copying SSH host keys Copying system image files Cleaning up Unmounting target filesystems Removing temporary files Cleaning up Unmounting target filesystems Removing temporary files Error: 'NoneType' object has no attribute 'get' vyos@r14:~$