Duplicate node error using Cisco XR yang models about ygot HOT 1 OPEN

Apologies for the late reply -- If by "merge" you mean resolving any differences between the two leaves and merging their properties, then this is not something we intend to support since in general they can be two different leaves with different types. If you mean to support the existence of both leaves at the same time, then ygot does not support it.

The reason is because goyang, and in extension ygot, doesn't support YANG's namespaces, therefore if in the same hierarchy the same name exists twice, even in different namespaces (in this case the augment node exists in the namespace of the augmenting module), then it will complain that there is a conflict. There is a document brainstorming on how to support this although there is currently no plan to implement it from the maintainers.

from ygot.