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 ('a4cdc3e7dbe18955a5f060d214969caa','0','18.216.154.39','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715903979','memberslist.php?sid=5316a993fe5d55b3d9ee9395e5706272','0','0','')
mysql error: Duplicate entry 'a4cdc3e7dbe18955a5f060d214969caa' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 17.05.2024 @ 01:59
Script: /memberslist.php?sid=5316a993fe5d55b3d9ee9395e5706272
Referer: