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 ('655581744fb68329a56352daeb7ebfc3','0','18.191.44.23','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715234587','formmail.php?userid=81&sid=976f083a1638d6c8e7699c6f68024a24','0','0','')
mysql error: Duplicate entry '655581744fb68329a56352daeb7ebfc3' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 09.05.2024 @ 08:03
Script: /formmail.php?userid=81&sid=976f083a1638d6c8e7699c6f68024a24
Referer: