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 ('0a61db8336b6e3e59f1c19afcfe1ba6b','0','18.226.4.239','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715049398','board.php?boardid=411&sid=936ee8ae61135d81f12cca2ce3fb3fda','0','0','')
mysql error: Duplicate entry '0a61db8336b6e3e59f1c19afcfe1ba6b' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 04:36
Script: /board.php?boardid=411&sid=936ee8ae61135d81f12cca2ce3fb3fda
Referer: http://wehrbauten.de/board.php?boardid=411&sid=936ee8ae61135d81f12cca2ce3fb3fda