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 ('5088e7d243910de3692efd9cc3d03438','0','3.15.143.181','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714663715','formmail.php?userid=612&sid=c8e39574554f3407122b3a8b02f08a78','0','0','')
mysql error: Duplicate entry '5088e7d243910de3692efd9cc3d03438' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 17:28
Script: /formmail.php?userid=612&sid=c8e39574554f3407122b3a8b02f08a78
Referer: http://wehrbauten.de/formmail.php?userid=612&sid=c8e39574554f3407122b3a8b02f08a78