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 ('d9bd31552044274dd2784c808a720059', -1, 1555742424, 1555742424, '0354b670', -4, 0)

Line : 158
File : sessions.php