Duplicate gameObject gets created when a gameObject is applied as an override to a cyclic prefab. Refer to the attached video.

Steps to reproduce:
1) Create a new project.
2) Create empty gameObject > Create a prefab "A" by dragging to the project browser.
3) Drag this prefab from the project to hierarchy and make it as a child of original prefab > Make "A" child of "A" prefab, making it cyclic.
4) Create an empty gameObject as a child, to the child prefab "A"
5) Select the child "A" > In the override window select "Apply all".

Actual result: Duplicate gameObject gets created.
Expected result: Override gets applied and duplicate gameObject does not get created.

Occurs on: 2019.3.0a8, 2019.2.0b8, 2019.1.0f2, 2018.3.9f1, 2018.3.0b6

Environment: Both Windows and Mac.