Updated from 5.0.2 to 6, then applied the patch.
The upgrade was . . . interesting. Took about 36 hours. There should be something on the download page about this for large instances. I’ll post separately on that.
After updating, I can no longer login. I see the last_challenge_response column updating with each failed login. How do I get back in? I’m using the admin account, if that matters.
I have not asked others to try yet.