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 ('b9452c591ee5cc7241199ce25159fd5e','0','3.141.244.201','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715274024','board.php?boardid=236&sid=4f86e70270bc98cd6090ef632184eeb8','0','0','')
mysql error: Duplicate entry 'b9452c591ee5cc7241199ce25159fd5e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 09.05.2024 @ 19:00
Script: /board.php?boardid=236&sid=4f86e70270bc98cd6090ef632184eeb8
Referer: http://wehrbauten.de/board.php?boardid=236&sid=4f86e70270bc98cd6090ef632184eeb8