Barman using old pg_start_backup on Postgresql-15

I'm trying to backup my server using barman but it's taking error on backup here's the check root@barman:~# barman check My_server Server Postgres_UniContent: PostgreSQL: OK superuser or standard user with backup privileges: OK PostgreSQL streaming: OK wal_level: OK replication slot: OK directories: OK retention policy settings: OK backup maximum age: OK (no last_backup_maximum_age provided) backup minimum size: OK (0 B) wal maximum age: OK (no last_wal_maximum_age provided) wal size: OK (0 B) compression settings: OK failed backups: OK (there are 0 failed backups) minimum redundancy requirements: OK (have 0 backups, expected at least 0) ssh: OK (PostgreSQL server) systemid coherence: OK pg_receivexlog: OK pg_receivexlog compatible: OK receive-wal running: OK archive_mode: OK archive_command: OK continuous archiving: OK archiver errors: OK you guys see everything is okay but then when I start backup root@barman:~# barman backup My_server Starting backup using rsync-concurrent method for server My_server in /barman/My_server/base/20241002T184311 ERROR: Backup failed issuing start backup command. DETAILS: pg_start_backup command: function pg_start_backup(unknown, boolean, boolean) does not exist LINE 1: ...heckpoint()) AS timeline, now() AS timestamp FROM pg_start_b... ^ HINT: No function matches the given name and argument types. You might need to add explicit type casts. So, as I see it's using pg_start_backup(unknown, boolean, boolean) but in Postgresql-15 the function name changed into pg_backup_start(). But I already grant the function to barman user grantee | function_schema | routine_name | privilege_type ---------+-----------------+-------------------------+---------------- barman | postgres | pg_backup_start | EXECUTE barman | postgres | pg_backup_stop | EXECUTE barman | postgres | pg_create_restore_point | EXECUTE barman | postgres | pg_switch_wal | EXECUTE (4 rows) postgres=# GRANT EXECUTE ON FUNCTION pg_backup_start(text, boolean) to barman; GRANT postgres=# GRANT EXECUTE ON FUNCTION pg_backup_stop(boolean) to barman; GRANT postgres=# GRANT pg_checkpoint TO barman; GRANT ROLE here is the diagnose information root@barman:/barman# barman diagnose { "global": { "config": { "barman_home": "/barman", "barman_user": "barman", "configuration_files_directory": "/etc/barman.d", "errors_list": [], "log_file": "/barman/barman.log", "log_level": "DEBUG" }, "system_info": { "barman_ver": "2.18", "kernel_ver": "Linux barman 5.15.0-60-generic #66-Ubuntu SMP Fri Jan 20 14:29:49 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux", "python_ver": "", "release": "Distributor ID:\tUbuntu\nDescription:\tUbuntu 22.04.5 LTS\nRelease:\t22.04\nCodename:\tjammy", "rsync_ver": "rsync version 3.2.7 protocol version 31", "ssh_ver": "", "timestamp": "Wed Oct 2 19:19:08 2024" } }, "servers": { "My_server": { "backups": { "20241002T184311": { "backup_id": "20241002T184311", "backup_label": null, "begin_offset": null, "begin_time": null, "begin_wal": null, "begin_xlog": null, "config_file": "/etc/postgresql/15/main/postgresql.conf", "copy_stats": null, "deduplicated_size": null, "end_offset": null, "end_time": null, "end_wal": null, "end_xlog": null, "error": "failure issuing start backup command (pg_start_backup command: function pg_start_backup(unknown, boolean, boolean) does not exist)", "hba_file": "/etc/postgresql/15/main/pg_hba.conf", "ident_file": "/etc/postgresql/15/main/pg_ident.conf", "included_files": null, "mode": "rsync-concurrent", "pgdata": "/pg_data/main", "server_name": "My_server", "size": null, "status": "FAILED", "systemid": "7412892106944724954", "tablespaces": null, "timeline": null, "version": 150008, "xlog_segment_size": 16777216 } }, "config": { "active": true, "archiver": true, "archiver_batch_size": 0, "backup_directory": "/barman/My_server", "backup_method": "rsync", "backup_options": "concurrent_backup", "bandwidth_limit": null, "barman_home": "/barman", "barman_lock_directory": "/barman", "basebackup_retry_sleep": 30, "basebackup_retry_times": 0, "basebackups_directory": "/barman/My_server/base", "check_timeout": 30, "compression": null, "conninfo": "host=IP_ADDRESS user=barman dbname=postgres", "create_slot": "auto", "custom_compression_filter": null, "custom_compression_magic": null, "custom_decompression_filter": null, "description": "Univision content watch information collecting server", "disabled": false, "errors_directory": "/barman/My_server/errors", "forward_config_path": false, "immediate_checkpoint": false, "incoming_wals_directory": "/barman/My_server/incoming", "last_backup_maximum_age": null, "last_backup_minimum_size": null, "last_wal_maximum_age": null, "max_incoming_wals_queue": null, "minimum_redundancy": 0, "msg_list": [], "name": "My_server", "network_compression": false, "parallel_jobs": 2, "path_prefix": "/usr/lib/postgresql/15/bin", "post_archive_retry_script": null, "post_archive_script": null, "post_backup_retry_script": null, "post_backup_script": null, "post_delete_retry_script": null, "post_delete_script": null, "post_recovery_retry_script": null, "post_recovery_script": null, "post_wal_delete_retry_script": null, "post_wal_delete_script": null, "pre_archive_retry_script": null, "pre_archive_script": null, "pre_backup_retry_script": null, "pre_backup_script": null, "pre_delete_retry_script": null, "pre_delete_script": null, "pre_recovery_retry_script": null, "pre_recovery_script": null, "pre_wal_delete_retry_script": null, "pre_wal_delete_script": null, "primary_ssh_command": null, "recovery_options": "", "retention_policy": "window 30 d", "retention_policy_mode": "auto", "reuse_backup": null, "slot_name": "on", "ssh_command": "ssh postgres@IP_ADDRESS", "streaming_archiver": true, "streaming_archiver_batch_size": 0, "streaming_archiver_name": "barman_receive_wal", "streaming_backup_name": "barman_streaming_backup", "streaming_conninfo": "host=IP_ADDRESS user=streaming_barman dbname=postgres", "streaming_wals_directory": "/barman/My_server/streaming", "tablespace_bandwidth_limit": null, "wal_retention_policy": "simple-wal 30 d", "wals_directory": "/barman/My_server/wals" }, "status": { "archive_command": "rsync -a %p barman@BARMAN_IPADD:/barman/My_server/incoming/%f", "archive_mode": "on", "archive_timeout": 0, "archived_count": 6, "checkpoint_timeout": 300, "config_file": "/etc/postgresql/15/main/postgresql.conf", "connection_error": null, "current_archived_wals_per_second": 3.2541333136528836e-06, "current_lsn": "A/CD000148", "current_size": 34695948524.0, "current_xlog": "000000010000000A000000CD", "data_checksums": "off", "data_directory": "/pg_data/main", "failed_count": 0, "has_backup_privileges": true, "hba_file": "/etc/postgresql/15/main/pg_hba.conf", "hot_standby": "on", "ident_file": "/etc/postgresql/15/main/pg_ident.conf", "is_archiving": true, "is_in_recovery": false, "is_superuser": true, "last_archived_time": "Wed Oct 2 18:41:58 2024", "last_archived_wal": "000000010000000A000000CC", "last_failed_time": null, "last_failed_wal": null, "max_replication_slots": "4", "max_wal_senders": "4", "pg_receivexlog_compatible": true, "pg_receivexlog_installed": true, "pg_receivexlog_path": "/usr/lib/postgresql/15/bin/pg_receivewal", "pg_receivexlog_supports_slots": true, "pg_receivexlog_synchronous": false, "pg_receivexlog_version": "15.8", "pgespresso_installed": false, "postgres_systemid": "7412892106944724954", "replication_slot": [ "on", true, "A/CD000000" ], "replication_slot_support": true, "server_txt_version": "15.8", "stats_reset": "Wed Sep 11 11:09:01 2024", "streaming": true, "streaming_supported": true, "streaming_systemid": "7412892106944724954", "synchronous_standby_names": [ "" ], "timeline": 1, "wal_compression": "off", "wal_keep_size": "0", "wal_level": "replica", "xlog_segment_size": 16777216, "xlogpos": "A/CD000148" }, "system_info": { "kernel_ver": "Linux unicontent 5.15.0-119-generic #129-Ubuntu SMP Fri Aug 2 19:25:20 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux", "python_ver": "", "release": "Distributor ID:\tUbuntu\nDescription:\tUbuntu 22.04.2 LTS\nRelease:\t22.04\nCodename:\tjammy", "rsync_ver": "rsync version 3.2.7 protocol version 31", "ssh_ver": "" }, "wals": { "last_archived_wal_per_timeline": {} } } } } Please help me to troubleshoot this barman difficulties.