Comment 40 for bug 1867092

Ok, that log file shows no changes to the shim-signed package version installed.

There is an update to grub, which would trigger re-running grub-install, which would install the current shimx64.efi to your ESP.

I don't know why you would not have had an up-to-date shimx64.efi on your system previously, unless you had manually changed the contents of the ESP.