SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO isbn2asin (isbn,asin,zeit,isbn13) VALUES ('0006','B000LV6ATI','1280424938','0')
mysql error: Duplicate entry '6' for key 1
mysql error number: 1062
mysql version: 5.0.51a-3ubuntu5.7-log
php version: 5.2.12-nmm1
Date: 29.07.2010 @ 19:35
Script: /wbb2/wunschliste.php
Referer: