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 ('d56343ccdaa4d8cb49ee7e7aea33c31f','0','18.119.133.96','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714719218','board.php?boardid=49&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=35872937f36d92cd3f7cba778e0f83cf','0','0','')
mysql error: Duplicate entry 'd56343ccdaa4d8cb49ee7e7aea33c31f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 03.05.2024 @ 08:53
Script: /board.php?boardid=49&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=35872937f36d92cd3f7cba778e0f83cf
Referer: http://wehrbauten.de/board.php?boardid=49&daysprune=1000&sortfield=lastposttime&sortorder=ASC&sid=35872937f36d92cd3f7cba778e0f83cf