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 ('d1eb5fe6a5692d0d73b67095c8e2e0f4','0','18.217.144.32','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714965621','markread.php?boardid=338&sid=3387e8f241e35065ce4222b512eda197','0','0','')
mysql error: Duplicate entry 'd1eb5fe6a5692d0d73b67095c8e2e0f4' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 05:20
Script: /markread.php?boardid=338&sid=3387e8f241e35065ce4222b512eda197
Referer: http://wehrbauten.de/markread.php?boardid=338&sid=3387e8f241e35065ce4222b512eda197