A Database Error Occurred

Error Number: 19

column last_activity is not unique

INSERT INTO ozgphp_ci_sessions (session_id, ip_address, user_agent, last_activity, user_data) VALUES ('433a32c860f87d37a01be8b60adb8f2f', '18.208.203.36', 'claudebot', 1710837257, '')

Filename: /www/users/mxturbocharger.com/CodeIgniter/database/DB_driver.php

Line Number: 330