So I'm uploading some 150,000 rows of data into a database over HTTP via Python backend, and the upload takes a while, thus I'm inserting it into a new table which I then swap with (by renaming) the old table:

```
create table tmp (like main);
alter sequence main_id_seq restart;
alter table tmp alter column id set default nextval('main_id_seq');
drop table main cascade;  -- THIS REMOVES THE SEQUENCE ^^^^^^^
alter table tmp rename to main;

```

How can I alter the sequence to not be linked to the `main` table, so that when I drop the `main` table, the sequence would stay linked to the current `tmp` table (new `main`)?