ID:171015 Can't place node "<name>" -- illegal custom region location assignment <name>. Preferred location assignments cannot be custom regions.

CAUSE: The Fitter could not place the specified node due to the specified illegal custom region location assignment. This error can occur when you edit a Quartus Prime Settings File (.qsf) manually, or when you make a location assignment, select a different target device for the current design, and select No when asked if you want to remove the location assignments. The location assignment is not supported for the new device.

ACTION: To avoid receiving this message in the future, remove the location assignment from the specified node, or click Yes when you are asked if you want to remove location assignments when selecting a different device.