How to give certain form fields priority over others? (auto-filling text form fields.)

If you have this exact requirement

- two PDF files have the same form fields but different contents

- you want to make one PDF file that combines the two and has the SAME contents in each file

- you want one file to "rule" and fill in both combined copies

Then you can export the form data from your preferred PDF, combine the forms (results at this point are unpredictable), then import the form data.

Do you need the form data to remain active form fields after the merge? If not, you can flatten the documents prior to merging and then you won't have the field problem.

I believe the information in the original fields is what is kept and the fields in the files you are merging get overwritten by it.