poudriere: error: MOVED: www/waterfox 2018-09-29 Has expired

# date ; uname -v
Mon 29 Oct 2018 22:33:22 GMT
FreeBSD 13.0-CURRENT r339737 GENERIC-NODEBUG
# ls -hl /usr/local/poudriere/ports/default/www/waterfox
total 35
-rw-r--r--  1 root  wheel   190B 29 Oct 21:54 distinfo
drwxr-xr-x  2 root  wheel   331B 29 Oct 21:54 files
-rw-r--r--  1 root  wheel   2.2K 29 Oct 21:54 Makefile
-rw-r--r--  1 root  wheel   1.0K 29 Oct 21:54 pkg-descr
-rw-r--r--  1 root  wheel   1.6K 29 Oct 21:54 pkg-message
# poudriere ports -u
[00:00:00] Updating portstree "default" with portsnap...Looking up portsnap.FreeBSD.org mirrors... 5 mirrors found.
Fetching snapshot tag from ec2-eu-west-1.portsnap.freebsd.org... done.
Latest snapshot on server matches what we already have.
No updates needed.
Ports tree is already up to date.
 done
# poudriere bulk -j current www/waterfox
[00:00:00] Creating the reference jail... done
[00:00:01] Mounting system devices for current-default
[00:00:01] Mounting ports/packages/distfiles
[00:00:01] Using packages from previously failed build
[00:00:01] Mounting ccache from: /var/cache/ccache
[00:00:01] Mounting packages from: /usr/local/poudriere/data/packages/current-default
[00:00:01] Copying /var/db/ports from: /usr/local/etc/poudriere.d/current-options
[00:00:01] Appending to make.conf: /usr/local/etc/poudriere.d/make.conf
/etc/resolv.conf -> /usr/local/poudriere/data/.m/current-default/ref/etc/resolv.conf
[00:00:01] Starting jail current-default
[00:00:02] Logs: /usr/local/poudriere/data/logs/bulk/current-default/2018-10-29_22h34m12s
[00:00:02] Loading MOVED for /usr/local/poudriere/data/.m/current-default/ref/usr/ports
[00:00:03] Ports supports: FLAVORS SELECTED_OPTIONS
[00:00:03] Gathering ports metadata
[00:00:03] Error: MOVED: www/waterfox 2018-09-29 Has expired: experiment ended: unsustainable
[00:00:03] Error: Fatal errors encountered gathering initial ports metadata
[00:00:03] Cleaning up
[00:00:03] Unmounting file systems
#