Cannot Update From Assignment Date with Bank Account Approval

Summary:

We recently implemented the bank account approval process and now cannot backdate the 'From Assignment Date' to be able to update old (unpaid) invoices

Content (required):

The 'From Assignment Date' defaults to approval date and does not allow for editing. We also aren't able to change 'Update Unpaid Invoices' for this supplier. Is there a way to allow for the 'From Assignment Date' to be customized and independent of the approval date so we can manually update old invoices? Or enable 'Update Unpaid Invoices' on the attached screenshot?

Thank you!

Hannah

Version (include the version you are using, if applicable):