phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb2_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('7d9e6b1dda28e3aa3948bc543370dc6c', -1, 1582911032, 1582911032, '03e9d95b', -2, 0, 0)

Line : 189
File : sessions.php