Wheels are usually described as fixed/fixed or fixed/free.
The difference being that the side of the hub described as "free" does not have threads for a lockring cut into it, so therefore it cannot be used to run a fixed sprocket.
As Braker says that means that when you run a freewheel on a "fixed" side of the hub, i.e. a side that has both sprocket and lockring threads cut into it then it means you have a very narrow area which is not supporting the freewheel.
However this is a non-issue, don't worry about it. Nothing will go wrong or break.
There are no real problems here.
Wheels are usually described as fixed/fixed or fixed/free.
The difference being that the side of the hub described as "free" does not have threads for a lockring cut into it, so therefore it cannot be used to run a fixed sprocket.
As Braker says that means that when you run a freewheel on a "fixed" side of the hub, i.e. a side that has both sprocket and lockring threads cut into it then it means you have a very narrow area which is not supporting the freewheel.
However this is a non-issue, don't worry about it. Nothing will go wrong or break.