SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6.pl2): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('607381564773e6f7e96fe297710a8036','0','3.14.70.203','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714777671','register.php?sid=f2784f58b24ac9545bbb4d3e1cbb6ec3','0','0','')
mysql error: Duplicate entry '607381564773e6f7e96fe297710a8036' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.41
php version: 5.3.29
Date: 04.05.2024 @ 01:07
Script: /wbb2/register.php?sid=f2784f58b24ac9545bbb4d3e1cbb6ec3
Referer: