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 ('c79a46ea9f425ff647a1732d3a3ceb11', -1, 1747956446, 1747956446, '340faec8', -9, 0, 0)

Line : 190
File : sessions.php