phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '9c171046ff9bce7361f41622ab8105e2' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('9c171046ff9bce7361f41622ab8105e2', -1, 1768346850, 1768346850, 'd849d8a4', 2, 0)

Line : 180
File : /www/includes/sessions.php