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 ('cff814be8673bdedaa8d200101461e78','0','3.135.205.146','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715407698','newthread.php?boardid=191&sid=ad2bd0ad09845cc8d933dcc8e6dda9cd','0','0','')
mysql error: Duplicate entry 'cff814be8673bdedaa8d200101461e78' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 11.05.2024 @ 08:08
Script: /newthread.php?boardid=191&sid=ad2bd0ad09845cc8d933dcc8e6dda9cd
Referer: