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https://nu.federati.net/url/282391 [answers microsoft com]
My "off the top of my head" guess is that this update required that the original user (the one that can elevate privileges to do administration)'s account be named "Owner", so it created a temporary profile under that name.
Why do I say this? Because I remember an update for #Win10 Home that created a similar problem if your original login was not named "Owner". Certain updates (e.g., from #Win8 or #Win8.1 to Win10) could not even be performed until the account was renamed.
(NOTE: Question is from 2020.)