ID:186076 Can't place differential I/O PLL "<name>" because its clock input pin "<name>" is placed at location <name> and not on a dedicated clock pin

CAUSE: The Fitter cannot place the specified differential I/O PLL because its specified clock input pin is placed at the specified location, and not on a dedicated clock pin.

ACTION: Reassign the specified clock input pin to a dedicated clock pin or delete the assignment.