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 ('57d8e244d65b9d947f449c112cd8d4bb', -1, 1582450614, 1582450614, '22e2f446', 3, 0, 0)

Line : 191
File : sessions.php