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 ('6c448217f94d7261ec1bd898e79fe448','0','3.141.41.187','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714844651','board.php?boardid=407&sid=1c4cfa5dbc7cec19bc876840da4c7a5d','0','0','')
mysql error: Duplicate entry '6c448217f94d7261ec1bd898e79fe448' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 19:44
Script: /board.php?boardid=407&sid=1c4cfa5dbc7cec19bc876840da4c7a5d
Referer: http://wehrbauten.de/board.php?boardid=407&sid=1c4cfa5dbc7cec19bc876840da4c7a5d