I’ll intellectually/emotionally/physically hard as answers. For me its either 12 hours straight “punching tubes” on a very large scotch marine firetube boiler at the beginning of my career or Easter around a decade ago when I was working with troubled teens and had to engage in 5 separate protective holds in one 16 hour double shift. The former was all physical and the latter was a combination of emotional and physical.


I used to manage developers in an environment like that. In case it helps, I can assure you it was shit for everyone.
We even had an issue much like the one you describe.
In case it amuses you, I took quiet joy in ruthlessly using the root cause analysis as leverage to fix several of the issues. And then I left for more money, better hours and more interesting work.
So at least there was a happy ending for everyone who was me, and everyone who I liked working with enough to recruit to my new firm.
Edit: And I hired away the dev who made a similar mistake for more money, too. It wasn’t their fault our environment was built with Kleenex!
I hate that so much. So many IT folks treat nonprod config changes like they won’t still ruin my weekend. Haha.