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 ('1644fe09aad6379b719030c8f4f37516','0','18.225.56.194','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715739926','board.php?boardid=141&daysprune=1000&sortfield=lastposttime&sortorder=ASC&page=2&sid=cda9f49d64d09bdeafab875ee3ae9306','0','0','')
mysql error: Duplicate entry '1644fe09aad6379b719030c8f4f37516' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 04:25
Script: /board.php?boardid=141&daysprune=1000&sortfield=lastposttime&sortorder=ASC&page=2&sid=cda9f49d64d09bdeafab875ee3ae9306
Referer: