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 ('c8f2d5f371bbfd85a6ca432b34ff7b15','0','3.19.76.105','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716722995','calendar.php?sid=a157f6edc66af8653affc391d9ce92eb','0','0','')
mysql error: Duplicate entry 'c8f2d5f371bbfd85a6ca432b34ff7b15' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 4.4.9
Date: 26.05.2024 @ 13:29
Script: /board/calendar.php?sid=a157f6edc66af8653affc391d9ce92eb
Referer: