SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.4): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('8ce61abf79ccc976ed4eef680e3da678','0','18.221.234.18','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715604908','board.php?boardid=316&sid=488e88a70b077862bc984f565d7ddb2e','0','0','')
mysql error: Duplicate entry '8ce61abf79ccc976ed4eef680e3da678' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.6.16-MariaDB-0ubuntu0.22.04.1-log
php version: 5.6.40-nmm8
Date: 13.05.2024 @ 14:55
Script: /board.php?boardid=316&sid=488e88a70b077862bc984f565d7ddb2e
Referer: