You should be able to correct it with enough supervision, like you would house breaking.
Just spend some time outside with your pup and when you see a squat start issue a quick verbal warning and redirect your pup to a correct location. However you can manage it, via recall or even physically moving them is fine as long as it isn't done negatively or by punishing.
You should also actively remove the scent from any area you don't want your pup eliminating with an enzyme cleaner, we use Nature's Miracle for accidents in our house. If they can smell it, weather it was them or some other dog, the chances are much higher they will use that spot again. So cleaning it well goes a long way.
To that end most pet shops have pheromone sticks that are scented like Urine. If you walk up to a counter and ask if they have Pee Posts most staff will know what you are talking about.
A Quick example can be found HERE
The idea is you stick them into the ground where you want your dog to eliminate and introduce it to your pup. There might be some investigation, but ideally the dog will mark the post with their own scent, and ideally will eliminate close to the post from there on.
I've personally never used one, so I couldn't say how well they work or how often you need to replace them, but I think we have some members around who have used them with some success.
Is this about the cake problem? What's the matter with you mathematicians, cake is never a problem. - Professor Lazlo