Hello

I am trying to migrate several relational databases that I have in FileMaker. In my case are databases of a music auditorium. In one base I have the concerts and in differentes bases I have the artists, the composers, the works, etc. They are linked via "ID" fields, that are text fields. When importing from CSV I can't link properly the databases as ninox uses its own key field instead of my ID field. Is there any way to set my FileMaker IF field as a primary field?