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 ('0b634b828cfec14a22bb3b187b2d3b2b', -1, 1582511060, 1582511060, '03e27a4a', -4, 0, 0)

Line : 191
File : sessions.php