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 ('8b1886b96b84b6b028894a10a870b1dc','0','3.133.126.239','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1717399208','search.php?sid=935197b5d5ef26b8e6da95ef091a0271','0','0','')
mysql error: Duplicate entry '8b1886b96b84b6b028894a10a870b1dc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 03.06.2024 @ 09:20
Script: /search.php?sid=935197b5d5ef26b8e6da95ef091a0271
Referer: