SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb2_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('648f15125f48a63460fa9f323a37a575','0','3.140.245.196','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716274719','thread.php?threadid=5340&threadview=0&hilight=&hilightuser=0&page=2&sid=f3afb98f5e6a3fb82b993bc51c94cfcb','0','0','')
mysql error: Duplicate entry '648f15125f48a63460fa9f323a37a575' for key 1
mysql error number: 1062
mysql version: 4.1.22-standard
php version: 5.3.29-1+hw8
Date: 21.05.2024 @ 02:58
Script: /wbb2/thread.php?threadid=5340&threadview=0&hilight=&hilightuser=0&page=2&sid=f3afb98f5e6a3fb82b993bc51c94cfcb
Referer: