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 ('4a13b8932483cb6adc15e9c49c80ed74','0','18.191.168.228','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714076595','formmail.php?userid=81&sid=1b01173a9ae10766c99bdc2f6720e75a','0','0','')
mysql error: Duplicate entry '4a13b8932483cb6adc15e9c49c80ed74' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 25.04.2024 @ 22:23
Script: /formmail.php?userid=81&sid=1b01173a9ae10766c99bdc2f6720e75a
Referer: