pgbackrest repo expire issue

[prakashkaavya0110]

hi team,

we are using pgbackrest on prod server however we are using the repo retention full is 1 but we could see the 3 backup set how to set this properly and we want to maintain 1 full backup please check below and help me.

backup info:

[12:38:37] postgres@upvpadb:~ $ /usr/bin/pgbackrest --config=/data/pgsql/pgbackrest/pgbackrest.conf --stanza=dds8prdpg --log-level-console=detail info
stanza: dds8prdpg
status: ok
cipher: none

db (current)
    wal archive min/max (12): 0000000100000005000000C6/0000000100000005000000CA

    full backup: 20240913-210006F
        timestamp start/stop: 2024-09-13 21:00:06+02 / 2024-09-13 21:00:12+02
        wal start/stop: 0000000100000005000000C6 / 0000000100000005000000C6
        database size: 232.6MB, database backup size: 232.6MB
        repo1: backup set size: 4MB, backup size: 4MB

    full backup: 20240914-210005F
        timestamp start/stop: 2024-09-14 21:00:05+02 / 2024-09-14 21:00:17+02
        wal start/stop: 0000000100000005000000C8 / 0000000100000005000000C8
        database size: 232.6MB, database backup size: 232.6MB
        repo1: backup set size: 4MB, backup size: 4MB

    full backup: 20240915-210005F
        timestamp start/stop: 2024-09-15 21:00:05+02 / 2024-09-15 21:00:11+02
        wal start/stop: 0000000100000005000000CA / 0000000100000005000000CA
        database size: 232.6MB, database backup size: 232.6MB
        repo1: backup set size: 4MB, backup size: 4MB

config file:

[12:33:46] postgres@upvpadb:~ $ cat /data/pgsql/pgbackrest/pgbackrest.conf

BEGIN pgbackrest.conf MANAGED BLOCK

[global]

endroit de la sauvegarde (ici montage NFS)

repo1-path=/Dumps/postgresql/dds8prdpg/pgbackrest

rC)tention minimum (sauvegardes complC(tes ici)

repo1-retention-full-type=time
repo1-retention-full=1
start-fast=y
process-max=4