phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO satshop_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('76d83e064b19f87cb0aa0f9d6b05777c', -1, 1731244152, 1731244152, '2cd295da', -4, 0, 0)

Line : 189
File : sessions.php