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 ('050d9cb9bdb2b1d3afb756b207be137a', -1, 1748582511, 1748582511, '0315be7b', -9, 0, 0)

Line : 190
File : sessions.php