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) VALUES ('0d4617a9fddc23ba3d4b82dcd9fa3084', -1, 1594558087, 1594558087, '03ec3b3f', -4, 0)

Line : 158
File : sessions.php