SQL-DATABASE ERROR

Database error in WoltLab Burning Board: Invalid SQL: INSERT INTO bb1_sessions VALUES ('e255955feb428964e881425db99dae69','0','54.242.236.164','CCBot/2.0 (http://commoncrawl.org/faq/)','1519346019','profile.php?userid=15&sid=e255955feb428964e881425db99dae69','0','0','0')
mysql error: Duplicate entry 'e255955feb428964e881425db99dae69' for key 'PRIMARY'
mysql error number: 1062
Date: 23.02.2018 @ 01:33
Script: /board/profile.php?userid=15&sid=e255955feb428964e881425db99dae69
Referer: