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 ('77edc7501b7a484657e024f86df0fbe1', -1, 1748655372, 1748655372, '0390d339', -9, 0, 0)

Line : 190
File : sessions.php