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 ('fddf80e06b544eed36b45bb2cace5497','0','13.58.182.29','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716216468','register.php?sid=c662f9260e7bb3dc1e190f965859cfbf','0','0','')
mysql error: Duplicate entry 'fddf80e06b544eed36b45bb2cace5497' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 4.4.9
Date: 20.05.2024 @ 16:47
Script: /board/register.php?sid=c662f9260e7bb3dc1e190f965859cfbf
Referer: