Create data table with single map's Actors

So I have a struct that is attempting to hook up specific Actors when I load in a CSV, where it finds the Actor in the scene with the name in the CSV. However, when I try and save the data table, I get an error that haven’t been able to find a clear solution to. I’ve edited some of the personal info out.

Can't save .../DeliveryOrdersCSV.uasset: Graph is linked to object(s) in external map.
External Object(s):
Bakery
Apartments
CityHall
TempStop1
TempStop2
...
  
Try to find the chain of references to that object (may take some time)?

I want to know how to make this work so I can maintain these references, as it will make my life a hell of a lot easier. Is there a way I can import at runtime for a specific map? Is there a quick way to convert from a data type like string to a specific Actor?