ID:16153 Ignored Decrease Input Delay to Internal Cells logic option assignment to input or bidirectional pin "<name>" because pin is assigned to global clock "<name>" and has no non-global destinations

CAUSE: You assigned the specified input or bidirectional pin to the specified global clock and assigned the Decrease Input Delay to Internal Cells logic option to the pin. The target device cannot support the pin because it is placed on a global clock and does not feed any non-global destinations.

ACTION: Delete the location assignment or the Decrease Input Delay to Internal Cells logic option assignment to the pin.