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 ('2547c4f8e043a06f4ff1d5cdb8f4c225', -1, 1713578115, 1713578115, '0391c947', -9, 0, 0)

Line : 187
File : sessions.php