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 ('51680723221125866942393c1e9b452e','0','3.15.229.113','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714744289','search.php?sid=034ca9478f426f328dbdcbdd04905c8d','0','0','')
mysql error: Duplicate entry '51680723221125866942393c1e9b452e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 03.05.2024 @ 15:51
Script: /search.php?sid=034ca9478f426f328dbdcbdd04905c8d
Referer: http://wehrbauten.de/search.php?sid=034ca9478f426f328dbdcbdd04905c8d