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 ('d12b9d0c8a5b6a3a45b49fa53af508e9','0','18.116.40.177','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715080013','jgs_portal.php?sid=f6ca050e2fa7895779ae589aef58968e','0','0','')
mysql error: Duplicate entry 'd12b9d0c8a5b6a3a45b49fa53af508e9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 13:06
Script: /jgs_portal.php?sid=f6ca050e2fa7895779ae589aef58968e
Referer: http://wehrbauten.de/jgs_portal.php?sid=f6ca050e2fa7895779ae589aef58968e