You're getting this error because the survey question is mapping to a constituent profile field that has a limited number of dropdown selections. More specifically, the response you are attempting to add, does not match an option within the dropdown menu of that constituent profile field. For example, if your survey question was being mapped to Title, Suffix, or Professional Suffix, then your survey responses must match the values available within those dropdown menus in the constituent profile, otherwise this message will be displayed.

If you would like to add additional selections within those dropdown menus, then you can make a request to support. Contact Support and provide this article number.