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 ('a978bbe46558e35c918584bfa12e48d4', -1, 1713511327, 1713511327, '030febc4', 0, 0, 0)

Line : 187
File : sessions.php