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 ('55f9c12ac9e77a741b38ddc444b5db77','0','18.118.93.123','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715766046','board.php?boardid=116&sid=a4165258af4dc70a6441e0c7fc5e168d','0','0','')
mysql error: Duplicate entry '55f9c12ac9e77a741b38ddc444b5db77' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 11:40
Script: /board.php?boardid=116&sid=a4165258af4dc70a6441e0c7fc5e168d
Referer: http://wehrbauten.de/board.php?boardid=116&sid=a4165258af4dc70a6441e0c7fc5e168d