SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb2_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('d5122a37ff4ab5170507a638ee95f858','0','18.221.13.173','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714204525','formmail.php?userid=81&sid=c7d2ee3f8b62f97b4aea9189ebdddad6','0','0','')
mysql error: Duplicate entry 'd5122a37ff4ab5170507a638ee95f858' for key 1
mysql error number: 1062
mysql version: 4.1.22-standard
php version: 5.3.29-1+hw8
Date: 27.04.2024 @ 03:55
Script: /wbb2/formmail.php?userid=81&sid=c7d2ee3f8b62f97b4aea9189ebdddad6
Referer: