Black artefacts after baked ambient occlusion

Hi everybody 🙂

I'm very new with subtance painter , and for the first time I tried to Auto bake all UV map.

Everythings is perfect exept the Ambient Occlusion Channel...

Here the result:

For info , it's a low poly model. 

If someone can explain to me how to resolve that , I'll really appreciate 🙂 

Have a nice day !