Back in my early days I was working on an application hosted on Windows on a Virtuozzo cluster (which was sort of containers before containers were a thing). We hit a bug that was resolved in the latest Service Pack of Windows so out of hours I started the update process on all 6 servers that made up the environment. When the first three restarted, they didn't come back.
Turns out Virtuozzo used some crazy single instance features (or something like that) where each server "ran on top of" and used the same code as the underlying host. By running the updates I completely hosed the environment. I was given a very stern talking to by my manager (but I gather not as stern as the talking to he got from his manager) but thankfully that was the worst of it.
What people seem to overlook in these kinds of scenarios is that if the person means well, they'll treat it as a lesson. They're not going to want to make the same mistake twice! You just have to work out what the intent was, and whether that person is capable of learning from it