ID:140008 Name "<name>" is already used by another region -- specify a different name

CAUSE: You attempted to name a region with a name that is already used by another region. If the error occurs after you have manually edited the Quartus Prime Settings File (.qsf), only one of the regions that uses this name is recognized by the Quartus Prime software.

ACTION: If you obtain this message while trying to rename a region within the Quartus Prime software, retry the operation using a different name. If you obtain this message after manually editing the Quartus Prime Settings File, it is important to correct the Quartus Prime Settings File so that the region is recognized in subsequent compilations.