Because the CA membership number is now invalid, the outgoing auditor cannot practically file ADT‑3;
Raise a detailed ticket with MCA Helpdesk (and, if needed, email to the MCA V3 helpdesk) explaining:
Request that:
either the earlier appointment be marked as ceased in the backend, or
a special relaxation / backend mapping be given so that ADT‑1 for the new auditor can be approved without the linked ADT‑3