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 ('18a36ea793d835357f17150d486de825', -1, 1560675118, 1560675118, '0358dc5d', -9, 0, 0)

Line : 191
File : sessions.php