Can't drop logical replication slot

There is a logical replication slot I can't drop. Tried using 

select pg_terminate_backend(PID) OK 

select pg_drop_replication_slot('slot_name) OK 

But the slot_name restarts with other active_pid. There is not subscriber connected and no errors in database log. We are using PG14.

Any help to drop or even rename replication slot would be appreciated.

Thanks in advance.

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Eduardo