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 ('9d1ab53a0ad89e31083545140a3996f5', -1, 1713502459, 1713502459, '12e2de0c', -4, 0, 0)

Line : 187
File : sessions.php