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 ('dcdd31e950058a32b8f06efdc2958942', -1, 1581978357, 1581978357, '12e87d1d', 20, 0, 0)

Line : 191
File : sessions.php