phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO filmscd_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('a8e9bb8a093a30db4cc0b2f62a54152a', -1, 1711663397, 1711663397, '641a236f', 1, 0, '0', '0')

Line : 175
File : sessions.php