Data Shuttle upload error related to Contact List fields
I setup a Data Shuttle upload workflow to load data from a Google Sheet into Smartsheet. One of the columns of data is mapped to a Contact List column type. In the source file, the field is populated with a name (e.g Joe Soap) but the workflow doesn't run and gives an error "This column is restricted to CONTACT_LIST values only." The Smartsheet column is restricted to specific values, however the name 'Joe Soap' is already in the list in column properties. What am I doing wrong?