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 ('f1c9e627585340eecb14a5f16155bfe6','0','3.19.56.45','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715393789','usercp.php?action=addsubscription&boardid=27&sid=a1f45b1d3ab526a0c65ce3e70bebedc1','0','0','')
mysql error: Duplicate entry 'f1c9e627585340eecb14a5f16155bfe6' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 11.05.2024 @ 04:16
Script: /usercp.php?action=addsubscription&boardid=27&sid=a1f45b1d3ab526a0c65ce3e70bebedc1
Referer: http://wehrbauten.de/usercp.php?action=addsubscription&boardid=27&sid=a1f45b1d3ab526a0c65ce3e70bebedc1