Contract Revenue in one currency (CHF) and Invoice Currency in another (EUR). How to manage ERV?

Summary:

We have a business case where

Functional Currency in GL Ledger: CHF

Contract Currency: CHF - e.g. 100k CHF

Contract is a fixed price and Revenue is recongnized on CHF

Billing Currency: EUR. Invoice Currency Conversion Date: Invoice Date. Invoiced Amount in EUR 110k which is converted a total 105k CHF

This will generate a difference between the invoice total amount in CHF (unearned revenue) and recongnized Revenues in CHF (unbilled)

Is there a way to manage such difference (5k) and to report it at project level?

Content (required):

Project Billing and Revenue Recongnition in a different currency