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 ('ca4e3ece6fe521e979f599e9b780b0f9','0','18.219.96.188','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715951706','register.php?sid=07e121090dc0a7faf9be8d7d97df57a4','0','0','')
mysql error: Duplicate entry 'ca4e3ece6fe521e979f599e9b780b0f9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 17.05.2024 @ 15:15
Script: /register.php?sid=07e121090dc0a7faf9be8d7d97df57a4
Referer: