phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('02140ff5b359c813bea8af2e1b6a3d0c', -1, 1714516859, 1714516859, '127424c0', 0, 0, 0)

Line : 187
File : sessions.php