Extracting data with Data Management - Two header lines required

Summary

data export file with two headlines required

Content

The system to be supplied with data from FCCS needs two header lines.
The first header consists solely of
1;2;3;4;5;6
The second header line then contains headings like for example
ReportingUnit;Year;Period;Currency;Account;Values

The second line is no problem. (with the exception, that I cannot rename the column of amounts)

But much more important: how can I create the first line additionally during export?

Thank you!

Code Snippet

1;2;3;4;5;6
ReportingUnit;Year;Period;Currency;Account;Values