SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6 pl2): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('ae3e3c5de37da126f99a5745ac4907ec','0','18.117.216.191','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1744131507','markread.php','0','0','')
mysql error: Duplicate entry 'ae3e3c5de37da126f99a5745ac4907ec' for key 'PRIMARY'
mysql error number: 1062
mysql version: 8.0.11
php version: 5.6.10
Date: 08.04.2025 @ 18:58
Script: /markread.php
Referer: http://gttempel.de/markread.php