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 ('6f95a3467127f8aae87c0fab22f5519f','0','18.188.70.255','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715018694','login.php?sid=7e01ca7c5434680f916d03ba49cb40fc','0','0','')
mysql error: Duplicate entry '6f95a3467127f8aae87c0fab22f5519f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 20:04
Script: /login.php?sid=7e01ca7c5434680f916d03ba49cb40fc
Referer: http://wehrbauten.de/login.php?sid=7e01ca7c5434680f916d03ba49cb40fc