SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Invalid SQL: INSERT INTO bb1_sessions VALUES ('3c5883dd36d772b7ca868503ff7870b2','0','54.91.171.137','CCBot/2.0 (http://commoncrawl.org/faq/)','1513224323','profile.php?userid=5&sid=3c5883dd36d772b7ca868503ff7870b2','0','0','0')
mysql error: Duplicate entry '3c5883dd36d772b7ca868503ff7870b2' for key 'PRIMARY'
mysql error number: 1062
Date: 14.12.2017 @ 05:05
Script: /board/profile.php?userid=5&sid=3c5883dd36d772b7ca868503ff7870b2
Referer: