duplicate key ? (fwd)

I didn't get any answer about my question posted yesterday.
please share your knowledge and wisdom with me, a poor s/w engineer.

---------- Forwarded message ----------
Date: Fri, 20 Oct 2000 21:30:27 +0900 (KST)
From: Sungchul Park <scpark(at)gen128(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: [GENERAL] duplicate key ?

Please check following...

Fo2Me=# drop table dirinfo;
DROP
Fo2Me=# CREATE TABLE dirinfo(
Fo2Me(# code VARCHAR(8) PRIMARY KEY,
Fo2Me(# level SMALLINT NOT NULL,
Fo2Me(# name TEXT NOT NULL,
Fo2Me(# count SMALLINT NOT NULL DEFAULT 0
Fo2Me(# );
NOTICE: CREATE TABLE/PRIMARY KEY will create implicit index 'dirinfo_pkey'
for table 'dirinfo'
CREATE
Fo2Me=# INSERT INTO dirinfo (code, level, name) VALUES('hbcol', 1, 'abc');
INSERT 63411 1
Fo2Me=# INSERT INTO dirinfo (code, level, name) VALUES('hbcrf', 1, 'zzz');
ERROR: Cannot insert a duplicate key into unique index dirinfo_pkey

I couldn't understand this error message. What's wrong?

The version of postgresql is 7.0.2 and the database created with EUC_KR encoding.

------
Park, Sungchul / mailto:scpark(at)gen128(dot)com
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