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 ('86689cd055a5e86b59d9e5c2e8de34e9','0','18.118.126.241','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714780163','board.php?boardid=581&sid=f2ce18ab08855df2655d8af364f95d54','0','0','')
mysql error: Duplicate entry '86689cd055a5e86b59d9e5c2e8de34e9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 01:49
Script: /board.php?boardid=581&sid=f2ce18ab08855df2655d8af364f95d54
Referer: http://wehrbauten.de/board.php?boardid=581&sid=f2ce18ab08855df2655d8af364f95d54