Some additional steps were necessary when upgrading to FreeBSD 15.0-RELEASE:
freebsd-update upgrade -r 15.0-RELEASE
freebsd-update install
shutdown -r now
freebsd-update install
rm -rf \
/usr/local/etc/pkg/repos/FreeBSD.conf \
/var/db/pkg/FreeBSD.meta \
/var/db/pkg/repo-FreeBSD.sqlite \
/var/db/pkg/repos/FreeBSD \
/var/db/pkg/repos/FreeBSD-kmods
pkg bootstrap -f
pkg update
pkg upgrade
pkg install misc/compat14x
freebsd-update install
shutdown -r now
Recreate /usr/local/etc/pkg/repos/FreeBSD.conf using the new FreeBSD-ports and FreeBSD-ports-kmods repository names if necessary. See /etc/pkg/FreeBSD.conf and pkg.conf(5) for more information.