FILE_FSET reference in AGS File

I have been able to import documents that were previously exported from another project but when I try to import a new document using the steps on how to use FILE_FSET the documents do not upload. I have had a look at the AGS file and all the exported documents are referenced in "GROUP","FILE", how can we add the references to "GROUP", "FILE" in the AGS for any new documents without doing it manually?