Change Mapping Logic
At the moment we have CSV-Items in Column 1 and map FLAT-Paths to them in COlumn 2
This needs to be turned around. One FLAT_Path needs data from one CSV-column All Flat-Pathes are a whole composition Multiple flat_pathes (e.g. language) can take data from the same csv-column (this is not possible, if we map flat to csv, only if we map csv to flat)