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 ('4d07c041931a18d9a5fa8fb0856a5f7d', -1, 1714065392, 1714065392, '12e2603d', -4, 0, 0)

Line : 187
File : sessions.php