Show stopping Issue selecting dropdowns in CMS

Hi, I am going rthrough the portfolio course and am stuying how to create client databases. On the video it asks me to set up a drop down list with some options. I did this and it appears successful. However. When I am required to pull in the data using the screen “Imported items” (image below). I find the drop down item (labelled ‘project type’ " has not mapped and will not map as it’s not selectable.

Thois means I can’t link the data base to the data.

Does anyone know what is going on please?

Thanks

Z