- Updated the `validate_common` function to accept an optional `existing_invoice` parameter, allowing for more robust validation when updating invoices.
- Introduced a new helper function, `_normalize_invoice_currency_value`, to standardize currency code handling.
- Adjusted currency validation logic to ensure proper handling of existing invoice data, preventing changes to currency types when associated line items exist.
- Modified the `validate_update` functions in both imports and exports to pass the `existing_invoice` parameter, ensuring consistent validation across different update scenarios.
AlexeerCT
a6c5abbe4c