I can not combine pdfs anymore with same name.

I am using the Organize Pages feature in Acrobat DC to add additional documents to an existing PDF. When organizing pages, I am getting a pop up that says "Any form fields that have the same name in the merged documents are now merged into one field. If you want the values in these fields to be unique, then you need to create a PDF portfolio

i was able to do this on Friday and now it get the pop-up message above. this is my job to combine files with the same fields . i have never had this pop-up show up. how to undo the update? I can not have a portfolio it will not work.