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 ('24bc52406848fb103f2d85941ac99ace', -1, 1714042878, 1714042878, '03914d72', -4, 0, 0)

Line : 187
File : sessions.php