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 ('0bd536e2ee14e9b574b69ce05e4e876c', -1, 1713889246, 1713889246, '0d3afc08', -11, 0, 0)

Line : 187
File : sessions.php