we need a full backup after upgrade otherwise nagios complains

howto/upgrades/buster.md

@@ -185,6 +185,10 @@ PostgreSQL is special and needs to be upgraded manually.
 
         ssh bungei.torproject.org "echo 'rm -r /srv/backups/pg/meronense-9.6/' | at now + 7day"
 
+ 8. make a new full backup of the new cluster:
+
+        ssh -tt bungei.torproject.org 'sudo -u torbackup postgres-make-one-base-backup $(grep ^meronense.torproject.org $(which postgres-make-base-backups ))'
+
 Notable changes
 ===============