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 ('9af21889695fa732ae29fca47921d321','0','3.145.1.51','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715575872','board.php?boardid=382&sid=e4d93a69b3fb79a0a6487b2a4f79c089','0','0','')
mysql error: Duplicate entry '9af21889695fa732ae29fca47921d321' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 06:51
Script: /board.php?boardid=382&sid=e4d93a69b3fb79a0a6487b2a4f79c089
Referer: http://wehrbauten.de/board.php?boardid=382&sid=e4d93a69b3fb79a0a6487b2a4f79c089