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 ('985b3fe24f3cb07fd7067cc48a93e580','0','3.135.247.47','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716535082','formmail.php?userid=15376&sid=0ba13c6580490382eaf2d4c54a5f6b13','0','0','')
mysql error: Duplicate entry '985b3fe24f3cb07fd7067cc48a93e580' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 24.05.2024 @ 09:18
Script: /formmail.php?userid=15376&sid=0ba13c6580490382eaf2d4c54a5f6b13
Referer: