Unfortunately, a standard upgrade of the forum software failed totally 2020-03-04T23:00:00Z. Due to this failure, three messages posted to the forum from 2020-03-02T23:00:00Z to 2020-03-03T23:00:00Z where lost.
I will restore them from my email “backup” and will repost them with my account.
To mitigate this issue for the future I will never do again the forum software upgrade without explicit backup before the upgrade. Sorry, for the inconvenience caused by my imprudence!
I never thought, that this could happen with a release upgrade from a stable to a stable release!