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 ('01a0cfc9e1060341e8739c2440d1c07e', -1, 1714035607, 1714035607, '03814597', 2, 0, 0)

Line : 187
File : sessions.php