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 ('155dfac81fad38ff044e07be868dfeb8','0','18.222.118.159','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715586217','register.php?sid=e78b28fd21b149360a51d3b7a0679fd6','0','0','')
mysql error: Duplicate entry '155dfac81fad38ff044e07be868dfeb8' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 09:43
Script: /register.php?sid=e78b28fd21b149360a51d3b7a0679fd6
Referer: