phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO docttorrdiscluc_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('1ec95e794ce4981e902846357bb6c1d6', -1, 1542435653, 1542435653, '3692c318', -2, 0, 0)

Line : 190
File : sessions.php