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 ('9cbb1d0e3c2384a9f337becda7922d91', -1, 1714004064, 1714004064, '0311bada', -11, 0, 0)

Line : 187
File : sessions.php