Request Form question opt-out

A Wrike user request the ability on Dropdown Custom Fields on Request Forms setup to create a new project (singular) from a set of Blueprints (plural) where the Request Form is controlling which Blueprint to use based on the Dropdown selection.  The user wishes to opt-out of have the chose of "none" vice putting the data into either the Title or Description of the Project.  Currently, Wrike Request Forms will only let you select "Title" or "Description" as a destination for Dropdown Option that in this instance are being used to control which Blueprint is used based on the person selected in the Dropdown.