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 ('74f2e671186adf9b5769d90712e273a9', -1, 1730415356, 1730415356, '039160a3', 38, 0, 0)

Line : 195
File : sessions.php