I am working on a Expenses Module, but currently stuck at this error:
The operation cannot be completed, probably due to the following:
- deletion: you may be trying to delete a record while other records still reference it
- creation/update: a mandatory field is not correctly set
[object with reference: account_id - account.id]
Here's the expense report that I've tried to post to journal entries

I follow the list of Chart of Account (CoA) and Journal that are on Odoo Demo, so any ideas how to fix that without configuring it in Python? If it is needed, show me how to install the Python etc
