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 ('426ea9207560835b2e70e00d0979be10','0','3.136.97.64','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714126702','board.php?boardid=160&sid=60dc3b7f1416640d3a5a0df46fe26e3b','0','0','')
mysql error: Duplicate entry '426ea9207560835b2e70e00d0979be10' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 26.04.2024 @ 12:18
Script: /board.php?boardid=160&sid=60dc3b7f1416640d3a5a0df46fe26e3b
Referer: