Two started cluster on the same data directory and port

Hi!

I have this situation on a server that is giving me problems.

postgres(at)hostname:~$ pg_lsclusters
Ver Cluster Port Status Owner Data directory Log file
14 main 5432 online postgres /var/lib/postgresql/14/main
/var/log/postgresql/postgresql-14-main.log
14 main_old 5432 online postgres /var/lib/postgresql/14/main
/var/log/postgresql/postgresql-14-main_old.log

How can I stop, even delete, the main_old cluster?

Thanks!