The Unit.owner of a neutral units is 16, but Debug().DebugCreateUnit() can not create a unit whose owner is 16

[monarchBacilluscoli]

I used Debug()->DebugCreateUnit() to create units by their information from one instance to a new game instance. But I found there are always fewer units created successfully.
Then I checked them and found no Neutral alliance unit was copied. Besides, the unit info shows that the owner of the original neutral units is 16. But you know, the highest player id is 15 in SC2Editor -- and the neutral player's id in it is 0.
So I tried to create a unit whose owner is 0, then I successed.
But it is still confusing. So I reported this issue here.