Trying to export Blocks to Agile Central as a User Story. The required mappings are done. However, the import fails, returning a notification that 'FlowState contains invalid input'. Although a variety of ARD fields were mapped into the Flow State field, but the same notification was generated, this includes creating a custom field and setting its default value to a valid value in Agile Central (e.g. Idea). What needs to be placed into the Flow State field to in order for the export to work?