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 ('1e5810523f85b8d0a0dbc28b63368e3d', -1, 1711652239, 1711652239, '03ed4166', 2, 0, 0)

Line : 187
File : sessions.php