DATEV export content changed!

DATEV export content changed!

Hi there forum people,

I have to urgently ask for your assistance: The content of the DATEV-export-file that is generated via Books has changed. Specifically the csv file that usually contains our customer-invoices and the credit notes: It now only contains the credit note data. The data of the invoices we sent to our customers is completely missing in the csv file!
I followed the same procedure as I do every month, and there definitely are valid invoices in the requested date range.
Please help ASAP, I need to get the data to our accountant via the DATEV export today!

Kind regards 
Lea