Got error when upgrading from mantis 1.05 to 1.2.4

[tg.chen]

Hi,
I have problem with upgrading mantis 1.05 to 1.2.4.

I got the error "ERROR 1062 (23000): Duplicate entry 'database_version-0-0' for key 1" after run sql commnad as below.

INSERT INTO mantis_config_table ( value, type, access_reqd, config_id, project_id, user_id ) VALUES ('183', 1, 90, 'database_version', 0, 0 );

I am using win2003 std, apache2.2.17, php5.3.5 and mysql5.0.
Please let me know how to solve it. Thank you.