Warning Notification " structure invert XX ft lower than headwater minimum elevation XX ft"

Hi, 

I got the warning notification stated above and I looked at my model and it seems that we have the lowest office in the pond outlet to be lower than the pond outlet invert and the headwater elevation. 

I am thinking that I need to fix that by placing the lowest orifice flush/slightly above the pond outlet invert and within the headwater range. 

Would that be correct?

Again please advise. 

Thanks,

Paola