phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO blitz_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('64ea1a5774cb10c59f86e867c57c3a98', -1, 1713984255, 1713984255, '0aa8c802', -9, 0, 0)

Line : 200
File : sessions.php