phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO BP_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('9dc6a5d505041df8ce42934474b1f62a', -1, 1762893544, 1762893544, '126109ab', -4, 0, 0)

Line : 193
File : sessions.php