phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('6b34d98fab44d3da0999c52a8f41ec4c', -1, 1713305365, 1713305365, '0387cd92', 5, 0, 0)

Line : 187
File : sessions.php