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 ('28e576758831e3779d9ceab8cbd0d2e6','0','18.188.72.75','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715572785','search.php?sid=a393ca6a4583e3aac404ddda604031ec','0','0','')
mysql error: Duplicate entry '28e576758831e3779d9ceab8cbd0d2e6' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 05:59
Script: /search.php?sid=a393ca6a4583e3aac404ddda604031ec
Referer: