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 ('3d94660b808060de374a9b5a2a950476','0','18.225.149.136','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715944144','register.php?sid=7ac74087f8f5c1d1c2c12a9b2a1a1abe','0','0','')
mysql error: Duplicate entry '3d94660b808060de374a9b5a2a950476' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 4.4.9
Date: 17.05.2024 @ 13:09
Script: /board/register.php?sid=7ac74087f8f5c1d1c2c12a9b2a1a1abe
Referer: