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 ('8519844d75881b89ee903f66af797bb8', -1, 1560679098, 1560679098, '365b0438', -4, 0, 0)

Line : 191
File : sessions.php