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 ('251df31283849110742c2d2403b44de1','0','18.188.228.210','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715708381','jgs_portal.php?sid=5b2aca1af942de81d9ae3028370019e9','0','0','')
mysql error: Duplicate entry '251df31283849110742c2d2403b44de1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 19:39
Script: /jgs_portal.php?sid=5b2aca1af942de81d9ae3028370019e9
Referer: http://wehrbauten.de/jgs_portal.php?sid=5b2aca1af942de81d9ae3028370019e9