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 ('fd33cdd65cad9ddba86a6fa1e9683e0b', -1, 1752387782, 1752387782, 'd849d8b2', 0, 0, 0)

Line : 189
File : sessions.php