Journal for Business Mileage/Other Expenses

I have some Sole Trader expenses that have not gone through my bank account (business mileage, expenses paid on personal credit card etc). I want to post these into my QuickFile account using a journal and backdate the journal to the date of the transaction. I have tried to do this and it seems to let me change the date. I’ve done a simple two line journal - Debit Travel; Credit Drawings, with equal and opposite £amounts. I get an error highlighting both rows saying there is an error. What is the problem, please? Many thanks.

Usually this is because not all the information is filled out

For example none of the lines have a description in the below screenshot

Thanks. That’s brilliant! Did not know I needed a Desc.