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 ('dfe2b6bf66c6dba1724198c73c3bfcc6','0','3.139.80.15','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715636442','board.php?boardid=248&sid=9e821830258e5cf3e9090786b52326cd','0','0','')
mysql error: Duplicate entry 'dfe2b6bf66c6dba1724198c73c3bfcc6' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 23:40
Script: /board.php?boardid=248&sid=9e821830258e5cf3e9090786b52326cd
Referer: http://wehrbauten.de/board.php?boardid=248&sid=9e821830258e5cf3e9090786b52326cd