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 ('72e527dec3a0b50a9997131cf7197a35', -1, 1747844844, 1747844844, '1276ab1c', 10, 0, 0)

Line : 190
File : sessions.php