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 ('df2ed5a6e548f34cac0f4565bb65ddf3','0','3.129.211.173','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715792725','board.php?boardid=97&sid=f0a1a80dd234994f32f8e6aa2225fd13','0','0','')
mysql error: Duplicate entry 'df2ed5a6e548f34cac0f4565bb65ddf3' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 19:05
Script: /board.php?boardid=97&sid=f0a1a80dd234994f32f8e6aa2225fd13
Referer: http://wehrbauten.de/board.php?boardid=97&sid=f0a1a80dd234994f32f8e6aa2225fd13