phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO iabb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('695be8d8b4ce1c98c7f17430fd0b3a29', -1, 1560894847, 1560894847, '035482fc', 45, 0, 0)

Line : 187
File : sessions.php