[root@co7g1 ~]# su - postgres -c "/usr/pgproee-9.6/bin/pg_probackup backup -B /tmp/pgsql/9.6/backup -b DELTA --instance data --delete-expired --delete-wal -d pgbench -h localhost -p 5432 -U backup -j 4"
INFO: Backup start, pg_probackup version: 2.0.22, backup ID: PHEYEU, backup mode: delta, instance: data, stream: false, remote: false
ERROR: Valid backup on current timeline is not found. Create new FULL backup before an incremental one.
WARNING: Backup PHEYEU is running, setting its status to ERROR