FreeBSD amd64 freebsd-update not updating from 12.2-RELEASE-p1 to 12.2-RELEASE-p2

root@freebsd:~ # uname -v
FreeBSD 12.2-RELEASE-p1 GENERIC
root@freebsd:~ # beadm list
ERROR: This system does not boot from ZFS pool
root@freebsd:~ # freebsd-update -r 12.2-RELEASE-p2 upgrade
src component not installed, skipped
Looking up update.FreeBSD.org mirrors... 3 mirrors found.
Fetching metadata signature for 12.2-RELEASE from update2.freebsd.org... done.
Fetching metadata index... done.
Fetching 1 metadata files... done.
Inspecting system... done.

The following components of FreeBSD seem to be installed:
kernel/generic kernel/generic-dbg world/base world/base-dbg world/doc
world/lib32 world/lib32-dbg

The following components of FreeBSD do not seem to be installed:

Does this look reasonable (y/n)? y

Fetching metadata signature for 12.2-RELEASE-p2 from update2.freebsd.org... failed.
Fetching metadata signature for 12.2-RELEASE-p2 from update4.freebsd.org... failed.
Fetching metadata signature for 12.2-RELEASE-p2 from update1.freebsd.org... failed.
No mirrors remaining, giving up.

This may be because upgrading from this platform (amd64)
or release (12.2-RELEASE-p2) is unsupported by freebsd-update. Only
platforms with Tier 1 support can be upgraded by freebsd-update.
See https://www.freebsd.org/platforms/index.html for more info.

If unsupported, FreeBSD must be upgraded by source.
root@freebsd:~ #