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 ('b9ab4e0f3a920ecaadc533e531935cd2','0','18.222.179.186','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715289001','calendar.php?sid=f3647e2ffbbe1f581ecfd3e0a2972bb9','0','0','')
mysql error: Duplicate entry 'b9ab4e0f3a920ecaadc533e531935cd2' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 09.05.2024 @ 23:10
Script: /calendar.php?sid=f3647e2ffbbe1f581ecfd3e0a2972bb9
Referer: