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 ('b6d2ead3129847a77a2aad8c68ebd6a0','0','18.117.196.217','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714681937','board.php?boardid=740&sid=717a2cbacb2132afc53a5f451ffb3339','0','0','')
mysql error: Duplicate entry 'b6d2ead3129847a77a2aad8c68ebd6a0' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 22:32
Script: /board.php?boardid=740&sid=717a2cbacb2132afc53a5f451ffb3339
Referer: http://wehrbauten.de/board.php?boardid=740&sid=717a2cbacb2132afc53a5f451ffb3339