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 ('9989fc6b4aa2de9e49d84eb49cd7e580','0','18.189.182.96','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715792800','thread.php?threadid=4538','0','0','')
mysql error: Duplicate entry '9989fc6b4aa2de9e49d84eb49cd7e580' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 15.05.2024 @ 19:06
Script: /thread.php?threadid=4538
Referer: