DATEV export no longer worked due to enhanced column content control

It was no longer possible to create a DATEV export due to enhanced control on the columns Beleginfo - Art 1 and Beleginfo - Inhalt 1. These fields are now both correctly filled: If the sales invoice or purchase invoice line contains an item, Beleginfo - Art 1 is filled with 'Item' and Beleginfo - Inhalt 1 is filled with the respective item code.