ID:154000 Removing the input ports might cause the transition equation and action condition verification to fail. Delete the selected input ports?

CAUSE: You attempted to remove the input ports, but the input ports might be used by transition equation and action condition. Removing input ports might fail the verification. The Quartus Prime software is asking if you want to proceed with the action.

ACTION: Click OK to remove the input ports. Otherwise, click Cancel to cancel the action.