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 ('28328f33d13b7d6b849c36330d4941f0','0','3.133.121.160','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714781968','board.php?boardid=191&sid=c32c61f97cbbea7d208ae10d60ddf084','0','0','')
mysql error: Duplicate entry '28328f33d13b7d6b849c36330d4941f0' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 02:19
Script: /board.php?boardid=191&sid=c32c61f97cbbea7d208ae10d60ddf084
Referer: http://wehrbauten.de/board.php?boardid=191&sid=c32c61f97cbbea7d208ae10d60ddf084