File name already exists during setup

For GiveCampus constituent data and imports.

This error in the initial-import setup checks for an active import configuration with the same sanitized filename pattern. For another file in an established feed, use the existing configuration’s supported upload/import flow rather than creating a second configuration. Review the existing mapping with Support before disabling/deleting it or deliberately creating a distinct feed; arbitrarily renaming the file can bypass the intended mapping. The message does not by itself mean duplicate gift rows were detected.