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 ('a0e6a540451ca20d55cd695fad7d6ab5','0','3.145.143.239','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714329763','calendar.php?sid=47c093558437c48885f85012464c903b','0','0','')
mysql error: Duplicate entry 'a0e6a540451ca20d55cd695fad7d6ab5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 28.04.2024 @ 20:42
Script: /calendar.php?sid=47c093558437c48885f85012464c903b
Referer: