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 ('a47cda207445343a74cb54289622896b','0','18.222.67.251','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715167432','jgs_galerie.php?sid=87a1d16dfd240fc2d7c78e949ab95826','0','0','')
mysql error: Duplicate entry 'a47cda207445343a74cb54289622896b' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 08.05.2024 @ 13:23
Script: /jgs_galerie.php?sid=87a1d16dfd240fc2d7c78e949ab95826
Referer: http://wehrbauten.de/jgs_galerie.php?sid=87a1d16dfd240fc2d7c78e949ab95826