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 ('6c295e808ea334a37059564d129c1c3d','0','18.220.65.61','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715639781','board.php?boardid=759&sid=1c23f0973f4e828adec850c77443bd2e','0','0','')
mysql error: Duplicate entry '6c295e808ea334a37059564d129c1c3d' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 00:36
Script: /board.php?boardid=759&sid=1c23f0973f4e828adec850c77443bd2e
Referer: http://wehrbauten.de/board.php?boardid=759&sid=1c23f0973f4e828adec850c77443bd2e