could not install

Problem in Moregroupware found!
Version (config.inc.php): 0.7.3 - Finally
Version (version.inc.php): 0.7.3 - Finally
PHP version: 4.3.3
PHP OS: Linux
register_globals: 0
magic_quotes_gpc: 0
safe_mode: 0
sql.safe_mode: 0
Server software: Apache/2.0.48 (Linux/SuSE)
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1;
en-US; rv:1.8b4) Gecko/20050908 Firefox/1.4
session.use_trans_sid: 0
session.auto_start: 0
file_uploads: 1
upload_max_filesize: 2M
upload_tmp_dir: /srv/www/htdocs/web0/phptmp/
memory_limit: 8M
post_max_size: 8M
max_execution_time: 30
max_input_time: 60
magic_quotes_runtime: 0
Database: mysql / 4.0.15 (4.0.15)
Program: /more/modules/calendar/index.php
File:
/srv/www/htdocs/web0/html/more/modules/calendar/setup/install.php
Line: 5

Error (SQL):
INSERT INTO mgw_calendar_appt_type (id, type, color)
VALUES (0, 'meeting', '#CDF5F5')

Error (MSG):
Duplicate entry '0' for key 1

Dump:
POST:

Array
(
)

GET:

Array
(
)