phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('396087cc259f171b66d2bf2fa9d29770', -1, 1730419011, 1730419011, '127456ff', 18, 0, 0)

Line : 195
File : sessions.php