How to Associate new UEFN project with old Map code

Map was created in Creative 1.0 and published. It has permanent map code (not private). Then it was transferred to a different team using UEFN.

Independently, a version of the map has been re-created in UEFN from scratch. It has nothing to do with the old project.

Question: How to associate new UEFN map with old map code so it can be first uploaded as private and then published?