pg_dump -n periods cannot dump the tables ? about periods HOT 5 CLOSED

mydb=# SELECT periods.add_system_time_period('carts', 'sys_start', 'sys_end');
2022-03-17 07:40:26.227 WIB [28301] ERROR:  trigger "carts_system_time_generated_always" for relation "carts" already exists
2022-03-17 07:40:26.227 WIB [28301] CONTEXT:  SQL statement "CREATE TRIGGER carts_system_time_generated_always BEFORE INSERT OR UPDATE ON carts FOR EACH ROW EXECUTE PROCEDURE periods.generated_always_as_row_start_end()"
	PL/pgSQL function add_system_time_period(regclass,name,name,name,name,name,name,name,name[]) line 322 at EXECUTE
2022-03-17 07:40:26.227 WIB [28301] STATEMENT:  SELECT periods.add_system_time_period('carts', 'sys_start', 'sys_end');
ERROR:  trigger "carts_system_time_generated_always" for relation "carts" already exists
CONTEXT:  SQL statement "CREATE TRIGGER carts_system_time_generated_always BEFORE INSERT OR UPDATE ON carts FOR EACH ROW EXECUTE PROCEDURE periods.generated_always_as_row_start_end()"
PL/pgSQL function add_system_time_period(regclass,name,name,name,name,name,name,name,name[]) line 322 at EXECUTE

mydb=# update carts set valid_start = now() where id = 1;
2022-03-17 07:41:11.476 WIB [28301] ERROR:  period "system_time" not found on table "carts"
2022-03-17 07:41:11.476 WIB [28301] STATEMENT:  update carts set valid_start = now() where id = 1;
ERROR:  period "system_time" not found on table "carts"

SELECT p.*
    INTO period_row
    FROM periods.periods AS p
    WHERE (p.table_name, p.period_name) = (table_name, period_name);

    IF NOT FOUND THEN
        RAISE NOTICE 'period % not found on table %', period_name, table_name;
        RETURN false;
    END IF;