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 ('5c3168d473a999b9cb4dfdf04ceb9077', -1, 1586115471, 1586115471, '0353bcfe', 0, 0, '0', 0)

Line : 188
File : sessions.php