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 ('2c2688065ceed70adb0d6feb5b893df8','0','3.142.55.75','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716281352','formmail.php?userid=7&sid=cb1927a606f7fe0f4217e75da3627ff8','0','0','')
mysql error: Duplicate entry '2c2688065ceed70adb0d6feb5b893df8' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 21.05.2024 @ 10:49
Script: /formmail.php?userid=7&sid=cb1927a606f7fe0f4217e75da3627ff8
Referer: