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 ('af7757a0f565018090cf9b023e84922d', -1, 1730419455, 1730419455, '0d3bb2b3', -9, 0, 0)

Line : 195
File : sessions.php