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 ('abc95a4e00f474e82e53a7e24d4614f5','0','18.191.46.36','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715341500','markread.php?boardid=72&sid=f67151754263a57447649840506a0da2','0','0','')
mysql error: Duplicate entry 'abc95a4e00f474e82e53a7e24d4614f5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 10.05.2024 @ 13:45
Script: /markread.php?boardid=72&sid=f67151754263a57447649840506a0da2
Referer: http://wehrbauten.de/markread.php?boardid=72&sid=f67151754263a57447649840506a0da2