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 ('77c647aa5dbbf7514ca6b279d87ed036','0','3.22.71.64','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716398221','search.php?action=user&userid=798&sid=353efef182e0c684bf5b96ff6220cc5a','0','0','')
mysql error: Duplicate entry '77c647aa5dbbf7514ca6b279d87ed036' for key 1
mysql error number: 1062
mysql version: 4.1.22-standard
php version: 5.3.29-1+hw8
Date: 22.05.2024 @ 13:17
Script: /wbb2/search.php?action=user&userid=798&sid=353efef182e0c684bf5b96ff6220cc5a
Referer: