… do not use freebsd-update and pkgbase on the same system. i believe freebsd-update was recently fixed to refuse to run in this configuration, but the fix might not have made it to a -RELEASE branch yet. …
Sorry, the errata notice mentioned in my previous email was for a different issue.
I thought of errata notices because of the needs_errata+ flag at <https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=289368#h9>.
