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 ('a27b3f503badaeac7590e781c298762e','0','18.224.95.38','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715171065','board.php?boardid=473&sid=d7edc69fae34e3841318d1bdae9ad683','0','0','')
mysql error: Duplicate entry 'a27b3f503badaeac7590e781c298762e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 08.05.2024 @ 14:24
Script: /board.php?boardid=473&sid=d7edc69fae34e3841318d1bdae9ad683
Referer: http://wehrbauten.de/board.php?boardid=473&sid=d7edc69fae34e3841318d1bdae9ad683