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 ('684e538c4bf7df9f38fa4730fc5d5d8a','0','18.119.138.123','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715667289','board.php?boardid=38&sid=c4866f082a093d0978e72609d8bc3d85','0','0','')
mysql error: Duplicate entry '684e538c4bf7df9f38fa4730fc5d5d8a' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 08:14
Script: /board.php?boardid=38&sid=c4866f082a093d0978e72609d8bc3d85
Referer: