Migrating partitions created with pg_dump

[vbhosle]

The output of show_partitions return "Given parent table not managed by pg_partman" ..
Some databases have schema created by using a schema dump from another database. Schema dump shows partition table creation as explicit create table statements not using the create_parent.
These partitions are not returned by the show_partitions, as the part_config is empty. Is there any way to fix this?

CREATE TABLE public.test_table (
    id bigint NOT NULL,
    name text,
    createdat timestamp with time zone NOT NULL
)
PARTITION BY RANGE (createdat);

-- it seems template table is never used
CREATE TABLE partman.template_public_test_table (
    id bigint NOT NULL,
    name text,
    createdat timestamp with time zone NOT NULL
);

CREATE TABLE public.test_table_default (
    id bigint NOT NULL,
    name text,
    createdat timestamp with time zone NOT NULL
);

CREATE TABLE public.test_table_p2023_01 (
    id bigint NOT NULL,
    name text,
    createdat timestamp with time zone NOT NULL
);
ALTER TABLE ONLY public.test_table ATTACH PARTITION public.test_table_default DEFAULT;
ALTER TABLE ONLY public.test_table ATTACH PARTITION public.test_table_p2023_01 FOR VALUES FROM ('2023-01-01 00:00:00+00') TO ('2023-02-01 00:00:00+00');

I read this document https://github.com/pgpartman/pg_partman/blob/5.0.0-beta/doc/migrate_to_partman.md
I am using pg_partman less than 5.0.0
As the names are aligned with partman. simply doing create_parent should work?

Partitions: test_table_p2023_01 FOR VALUES FROM ('2023-01-01 00:00:00+00') TO ('2023-02-01 00:00:00+00'),
            test_table_p2023_02 FOR VALUES FROM ('2023-02-01 00:00:00+00') TO ('2023-03-01 00:00:00+00'),
            test_table_p2023_03 FOR VALUES FROM ('2023-03-01 00:00:00+00') TO ('2023-04-01 00:00:00+00'),
            test_table_default DEFAULT

Update: I had to drop test_table_default (it has no data) and then create_parent seemed to work as there were no failures.

NOTICE:  relation "template_public_test_table" already exists, skipping
 create_parent 
---------------
 t
(1 row)