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 ('5e6d896c91d1d410c9fefc841f2cbfd9','0','3.15.221.67','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715407020','profile.php?userid=42756&sid=7f8d3232156cbfe87925ff3fce49f93f','0','0','')
mysql error: Duplicate entry '5e6d896c91d1d410c9fefc841f2cbfd9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.1.41-3ubuntu12.3
php version: 4.4.9
Date: 11.05.2024 @ 07:57
Script: /wbb2/profile.php?userid=42756&sid=7f8d3232156cbfe87925ff3fce49f93f
Referer: