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 ('bd84b1d312cc007f837bbe4e3abfd509','0','3.15.197.123','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714699716','board.php?boardid=459&sid=00ae46339fc36f9522d82d223afe853e','0','0','')
mysql error: Duplicate entry 'bd84b1d312cc007f837bbe4e3abfd509' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 03.05.2024 @ 03:28
Script: /board.php?boardid=459&sid=00ae46339fc36f9522d82d223afe853e
Referer: