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, is_robot, session_admin) VALUES ('b4b47f4cf66341de4b873d5ea35d0927', -1, 1586113787, 1586113787, '0353bcfe', 24, 0, '0', 0)

Line : 188
File : sessions.php