SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('351df375112ce42a7f2a8fa6a1e54f7f','0','18.221.141.44','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714413308','board.php?boardid=39&daysprune=1000&sortfield=lastposttime&sortorder=DESC&page=1&sid=935630f0e684d08004e61522e1717c93','0','0','')
mysql error: Duplicate entry '351df375112ce42a7f2a8fa6a1e54f7f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 29.04.2024 @ 19:55
Script: /board.php?boardid=39&daysprune=1000&sortfield=lastposttime&sortorder=DESC&page=1&sid=935630f0e684d08004e61522e1717c93
Referer: