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 ('aa2c075a6bfcfea1b401d22fdb7da527','0','3.139.105.83','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715652547','formmail.php?userid=612&sid=1c86fe7fbcb3b5062f86effa1755e316','0','0','')
mysql error: Duplicate entry 'aa2c075a6bfcfea1b401d22fdb7da527' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 04:09
Script: /formmail.php?userid=612&sid=1c86fe7fbcb3b5062f86effa1755e316
Referer: http://wehrbauten.de/formmail.php?userid=612&sid=1c86fe7fbcb3b5062f86effa1755e316