Hi Odiware Technologies,
I have same problem  and I use Odoo 17 CE how can i Reset Connection or Renew Keys

Yes, you're on the right track. Since your previous Odoo CE instance is gone but the EDI proxy still holds a registration with your VAT and old key pair, the current installation can't fully sync (especially for status updates and incoming invoices).

✅ Here's how to reset/renew the connection properly:

1. Regenerate the key pair in Odoo:
   • Go to Invoicing > Configuration > Electronic Invoicing > EDI Formats.
   • Open the FatturaPA (Italian e-invoicing) format.
   • Click "Reset Connection" or "Renew Keys" (wording may vary).
   • This regenerates a new public/private key pair and re-registers with the EDI Proxy using your current Odoo instance.
2. Ensure Odoo has internet access and the correct company VAT:
   • Make sure the VAT number in Settings > Companies > Your Company is correct.
   • Odoo uses this to register with the proxy and associate with SDI.
3. Wait for the registration to complete:
   • Check logs or status updates. Once confirmed, incoming SDI updates and supplier invoices should start coming in again.
4. (Optional) Contact Odoo Support or your proxy provider:
   • If it's stuck (e.g., key mismatch persists), they can manually clear the old key pair or re-link your VAT to the new one.

Let me know which Odoo version you're on if you want the exact UI steps.