PostgreSQL, problems with sequence

CREATE SEQUENCE test_id_seq
  INCREMENT 1
  MINVALUE 1
  MAXVALUE 9223372036854775807
  START 1
  CACHE 1;
ALTER TABLE test_id_seq OWNER TO admin;

CREATE TABLE test
(
  id bigserial NOT NULL,
  data character varying(128) NOT NULL,
  CONSTRAINT pkey_id_test PRIMARY KEY (id)
)
WITH (
  OIDS=FALSE
);
ALTER TABLE test OWNER TO admin;

CREATE OR REPLACE RULE replace_test AS
    ON INSERT TO test
   WHERE (EXISTS ( SELECT 1
           FROM test
          WHERE test.id = new.id)) DO INSTEAD  UPDATE test SET data = new.data
  WHERE test.id = new.id;

ALTER TABLE test
  ADD CONSTRAINT pkey_id_test PRIMARY KEY(id);

ALTER TABLE test ADD COLUMN id bigint;
ALTER TABLE test ALTER COLUMN id SET STORAGE PLAIN;
ALTER TABLE test ALTER COLUMN id SET NOT NULL;
ALTER TABLE test ALTER COLUMN id SET DEFAULT nextval('test_id_seq'::regclass);
ALTER TABLE test ADD COLUMN data character varying(128);
ALTER TABLE test ALTER COLUMN data SET STORAGE EXTENDED;
ALTER TABLE test ALTER COLUMN data SET NOT NULL;

INSERT INTO "test" ("data") VALUES ('1')

SELECT "id" FROM "test" ORDER BY "id"

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