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 ('3c995a991480d1c31927712e443fbaa0','0','18.188.170.189','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716762072','index.php','0','0','')
mysql error: Duplicate entry '3c995a991480d1c31927712e443fbaa0' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.5.62-0+deb8u1
php version: 5.6.40-0+deb8u12
Date: 27.05.2024 @ 00:21
Script: /archive/index.php
Referer: https://www.matheboard.de/archive/535330/archive/23/archive/85/1/archive/68/7/board.html