ERROR: Check 'backup maximum age' failed for server 'satdb_streaming'

[savita...@gmail.com]

My barman was working smoothly until, the barman server , i killed the running barman backup. 

Barman receive-wal is running and i see wals file being shipped , but when i put command , i get error 

barman@ip:~$ barman backup pg

ERROR: Impossible to start the backup. Check the log for more details, or run 'barman check pg'

and in logs 

2021-02-25 22:27:20,674 [12367] barman.server ERROR: Check 'continuous archiving' failed for server 'pg'

2021-02-25 22:27:20,686 [12367] barman.server ERROR: Impossible to start the backup. Check the log for more details, or run 'barman check pg' 

barman@ip:~$ barman check pg

Server pg:

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: FAILED (interval provided: 3 days, latest backup age: No available backups)

compression settings: OK

failed backups: OK (there are 0 failed backups)

minimum redundancy requirements: FAILED (have 0 backups, expected at least 7)

ssh: OK (PostgreSQL server)

systemid coherence: OK

pg_receivexlog: FAILED

pg_receivexlog compatible: FAILED (PostgreSQL version: 10.13, pg_receivexlog version: None)

receive-wal running: OK

archive_mode: OK

archive_command: OK

continuous archiving: FAILED

archiver errors: OK

Please help , i am stuck thanks in advance 

Thanks 

savita