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 ('ff7299db65674a2fd95150e6f4c21d42', -1, 1714016317, 1714016317, '12e2b1df', -4, 0, 0)

Line : 187
File : sessions.php