Pairing and Reserve runs are launched and run separately. The runs are tied together by category. You cannot launch a reserve run until a valid pairing run has been completed for the associated category.
A pairing run cannot be exported without a complete valid reserve run, and a reserve run cannot be launched until a valid pairing run from the same category has been completed.
The reserve run is the child to the pairing run and the pairing is the ancestor to the reserve run.