"Assertion failed" Exception is thrown on after reverting changes in prefab

Steps to repro:

1. Create a new Project
2. Hierarchy > Create Empty
3. Add Line Renderer component on the empty GameObject
4. Select GameObject > Drag in Project > Asset to make prefab
5. Hierarchy > GameObject > Delete
6. Drag and drop prefab GameObject into the Hierarchy
7. Gameobject > Inspector > Line Renderer > Edit > Light probes > Blend Probes
8. AnchorOverride > select icon > Assign Main Camera
9. AnchorOverride > right-click > Revert

Actual Result: Assertion failed on Expression error is thrown

Expected Result: Changes reverts

Reproducible on :
2019.3.0a3, 2019.3.0b3, 2019.1.0f2, 2018.3.0f2

Environment:
Mac and Windows