Copy an external Project Board to our internal Board

I a trying to copy an external project board supported by our external consultants into an internal Asana board as a premium member. I followed the instructions, but it is giving me an error message of the custom tasks are not mapping over.

Essentially I am trying to preserve the data from another board and migrating it into our internal board.


The external board is an Asana project? :face_with_monocle: can you share the instructions you followed and a screenshot of the error?