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 ('20cbfb12a9faa63fe2909cbd838903a2','0','3.144.222.208','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716239320','thread.php?threadid=7932&threadview=0&hilight=&hilightuser=0&sid=097edeb1861508d6da6638f84a7840bf','0','0','')
mysql error: Duplicate entry '20cbfb12a9faa63fe2909cbd838903a2' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 20.05.2024 @ 23:08
Script: /thread.php?threadid=7932&threadview=0&hilight=&hilightuser=0&sid=097edeb1861508d6da6638f84a7840bf
Referer: