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 ('61b3e2d4742f114ec60f918c8fb1c6dd','0','18.221.85.100','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716211382','formmail.php?userid=12930&sid=6924bb60f78be38039f6fcf432119103','0','0','')
mysql error: Duplicate entry '61b3e2d4742f114ec60f918c8fb1c6dd' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 20.05.2024 @ 15:23
Script: /formmail.php?userid=12930&sid=6924bb60f78be38039f6fcf432119103
Referer: