Unintelligible dialog in PDF app

Applications Report PDF
#1

When generating a PDF app I get a dialog box telling me something. Can someone tell me what this means:

Had the done alterations manually in the code of the generation of PDF Report,
it is necessary that you it marks one of the options below,
in case that wants to substitute its automatically generated code for one.

This makes absolutely no sense. Can we get a better translation NM?

#2

My translation: The code must be regenerated, because you have a change, probably made ​​in the field number or position. At least then comes the o.g. notification …