Crashing the web site and not having a viable backup are two very embarrasing things to do by station support.
I was creating a local copy of the web site database using an old local backup and failed to notice that the database the upgrade software was referencing wasn't my local database but the one on our web hosting server. When I noticed it was too late. We lost a lot of presenter page data and news items plus some recent user loin data.. Fortunately this databse update glitch also could be turned round to edit the database to the latest copy of a web site backup we had.
The moral of this story is check , then check again before pressing the update commit button. Also keep more up to date backups is the second.
Tech Coordinator - absolutely mortified with embarrassment.