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 ('aab449e9f2f71ff9e7f96776512fa19e','0','3.136.97.64','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714612920','board.php?boardid=546&sid=2426db143a4f871b2797f8122f7670c9','0','0','')
mysql error: Duplicate entry 'aab449e9f2f71ff9e7f96776512fa19e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 02.05.2024 @ 03:22
Script: /board.php?boardid=546&sid=2426db143a4f871b2797f8122f7670c9
Referer: