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 ('6963704882299e20f2f448e5cd75edc1','0','3.137.185.180','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715106325','usercp.php?action=addsubscription&boardid=78&sid=eb70290b1eee2413b8e6e35ad7b2e8a9','0','0','')
mysql error: Duplicate entry '6963704882299e20f2f448e5cd75edc1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 07.05.2024 @ 20:25
Script: /usercp.php?action=addsubscription&boardid=78&sid=eb70290b1eee2413b8e6e35ad7b2e8a9
Referer: