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 ('0996091b7e4f22ef536564f37fc5d6d1','0','3.15.3.154','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714421284','formmail.php?userid=6188&sid=671c9786f296f9c23ad5ac48a097af12','0','0','')
mysql error: Duplicate entry '0996091b7e4f22ef536564f37fc5d6d1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 29.04.2024 @ 22:08
Script: /formmail.php?userid=6188&sid=671c9786f296f9c23ad5ac48a097af12
Referer: