USCIS terminated the case. Termination ends the case without an approval, and the notice states the reason.
What happens next
Read the notice for the reason and any deadline. Getting advice quickly is worthwhile.
Official USCIS wording
On September 7, 2024, we terminated your Form I-485, Application to Register Permanent Residence or Adjust Status, Receipt Number XXXXXXXXXXXXX, and mailed you a termination notice. Please follow the instructions in the notice. If you do not receive your notice by October 7, 2024, please go to www.uscis.gov/e-request to request a copy of the notice. If you move, go to www.uscis.gov/addresschange to give us your new mailing address.