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 ('d1031b10e0164df7bb2b62e81c1c0500', -1, 1728661522, 1728661522, '2cc87ad6', -11, 0, 0)

Line : 189
File : sessions.php