ID:15671 Can't use ena input port when CLOCK_TYPE parameter is set to external clock output for Clock Control Block "<name>" and is driven by node "<name>"

CAUSE: You specified the ena input port of the specified Clock Control Block. However, the Quartus Prime software cannot use the specified ena input port when the CLOCK_TYPE parameter is set to external clock output and is driven by the specified node.

ACTION: Modify design so that the ena input port is disabled.