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 ('06a807823b11b12d9501c7871e9ea801','0','3.21.158.148','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714736651','formmail.php?userid=608&sid=80aa72ed5641d40b8bf1e8a1e4e72665','0','0','')
mysql error: Duplicate entry '06a807823b11b12d9501c7871e9ea801' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 03.05.2024 @ 13:44
Script: /formmail.php?userid=608&sid=80aa72ed5641d40b8bf1e8a1e4e72665
Referer: http://wehrbauten.de/formmail.php?userid=608&sid=80aa72ed5641d40b8bf1e8a1e4e72665