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 ('9850db85da2c8ea59a927e0ddfd394a5','0','3.149.229.15','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716285148','calendar.php?sid=e8a699cd0475f49376e7e2a7e4b830b1','0','0','')
mysql error: Duplicate entry '9850db85da2c8ea59a927e0ddfd394a5' for key 1
mysql error number: 1062
mysql version: 4.1.22-standard
php version: 5.3.29-1+hw8
Date: 21.05.2024 @ 05:52
Script: /wbb2/calendar.php?sid=e8a699cd0475f49376e7e2a7e4b830b1
Referer: