I've got two WeBWorK servers running 2.16 (one is a PreTeXt backend, and the other is my production server, which I just upgraded during a week of downtime between semesters.)
On both of them, I've noticed that although I've just run OPL-update, on the admin course I have the message:
|Your current branch of the Open Problem Library is up to date.|
|The library index is older than the library, you need to run OPL-update.|
Should I be concerned there are undiagnosed database issues? I didn't migrate from MySQL to MariaDB.
I also get a message that there are upgrades available for WeBWorK but I assume that's just because 2.16 is not yet merged into master.