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 ('a8f516483be9bcac2c9848a753f91b6a','0','18.116.85.58','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715740887','board.php?boardid=241&sid=891a91ab8f3cd401f90b1a76f69ad677','0','0','')
mysql error: Duplicate entry 'a8f516483be9bcac2c9848a753f91b6a' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 04:41
Script: /board.php?boardid=241&sid=891a91ab8f3cd401f90b1a76f69ad677
Referer: http://wehrbauten.de/board.php?boardid=241&sid=891a91ab8f3cd401f90b1a76f69ad677