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 ('a7104b6e3443a31b3d5bf37a3f4d57c5','0','18.219.96.188','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715472472','thread.php?goto=nextoldest&threadid=2288&sid=cd1bb6820938d2d23800b1ce8b6ff086','0','0','')
mysql error: Duplicate entry 'a7104b6e3443a31b3d5bf37a3f4d57c5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 12.05.2024 @ 02:07
Script: /thread.php?goto=nextoldest&threadid=2288&sid=cd1bb6820938d2d23800b1ce8b6ff086
Referer: http://wehrbauten.de/thread.php?goto=nextoldest&threadid=2288&sid=cd1bb6820938d2d23800b1ce8b6ff086