"Column does not exist"

Hello,

I am trying to add the a currency lookup column to the country object, as it will be very helpful a specific use case we have to be able to know which countries use which currency. I have already created a new package with a replacing object to add the column, but now whenever I try to import the list of countries I get the following error:

The same error comes up when trying to bind the data via configuration as shown below:

You can see behind this message that it correctly adds the column from the replacing object I created, but it won't allow me to save it.

Any help in understanding what I am doing wrong would be very helpful.

Thanks in advance!