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 ('88a8f1abd214951d89cece7e19bc9aa6','0','3.133.156.156','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715389417','index.php?sid=c3737d4ac07b2fb469e7c0ef066fbbd0','0','0','')
mysql error: Duplicate entry '88a8f1abd214951d89cece7e19bc9aa6' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 11.05.2024 @ 03:03
Script: /index.php?sid=c3737d4ac07b2fb469e7c0ef066fbbd0
Referer: http://wehrbauten.de/index.php?sid=c3737d4ac07b2fb469e7c0ef066fbbd0