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 ('6390cac9fbe8426e7a6708e9c17ea686', -1, 1713989906, 1713989906, '0aa8c802', -8, 0, 0)

Line : 200
File : sessions.php