Invoice import - not recognising a customer
I use a database for raising invoices for our workshop, and these need to be imported into QBO, we were using Sage, but we've now changed to QBO.
Yesterday I imported one invoice, there was issues - I'd exported the wrong field, but I corrected the issues within QBO, but the main point is QBO recognised the customer, and the import completed.
Today I've updated my export, and tried another, but QBO refuses to recognise the customer, saying that it does not exist, when it does!


I've not blanked out any information in the above screenshot, I've actually deleted all other customer details and saved it, so the customer is literally just named AUT003 (where is the account number field?????), but it still fails.
The one I did yesterday had the account number as the first name which is how I initially had this one setup, and I did not have this problem, so why am I having it today?
