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 ('f9beaa8d54bb09dc14142f90ad161cca', -1, 1752882012, 1752882012, 'd849d904', 14, 0, 0)

Line : 189
File : sessions.php