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 ('a7df3029ed27fea1d5df5cd9a216c8dc','0','3.146.37.150','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715427656','board.php?boardid=111&sid=408e587db5e99d4f410f5c4f7b2b003e','0','0','')
mysql error: Duplicate entry 'a7df3029ed27fea1d5df5cd9a216c8dc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 11.05.2024 @ 13:40
Script: /board.php?boardid=111&sid=408e587db5e99d4f410f5c4f7b2b003e
Referer: http://wehrbauten.de/board.php?boardid=111&sid=408e587db5e99d4f410f5c4f7b2b003e