Default Currency and Currency List Restriction Failure for Paris Business Unit in AR transactions

We are encountering a critical error in the Oracle ERP system concerning the default currency and currency list for the Paris Business Unit in the Receivables module. This issue presents two major problems:

1. Default Currency Misalignment: The Paris Business Unit is expected to default to EUR for all AR transactions. However, the system erroneously defaults to the system's base currency, USD. This misalignment is causing significant issues with transaction accuracy and financial reporting.
2. Currency List Display Error: The system currently shows all available currencies in the dropdown list for currency selection. For the Paris Business Unit, this list should exclusively show EUR to ensure compliance with the client's operational requirements. The current configuration poses a risk of incorrect currency selection and impacts data integrity.