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Fixed in Unity 2019.2



Found in


Issue ID




"Original Prefab" and "Replace Base" loose information about prefabs that are nested

Scene Management



Priority: 2Necessary for shipping a final release


Severity: 2Core functionality majorly impacted

1. Add GameObject and child to it
2. Convert child to prefab
3. Convert parent to prefab
4. Drag parent to Project Browser and choose "Original Prefab" from confirmation dialog
Child is not a prefab instance anymore

1. Add GameObject and convert it to a prefab
2. Open this prefab and add child
3. Convert child to a prefab too
==> Child is nested prefab now
4. Drag root to Project Browser and choose "Create Base"
5. Drag root one more time and choose "Replace Base"
Child is not a prefab instance anymore

Note: "Insert Base" behaves as expected

Regression somewhere between
Version 2018.3.0b12 (77f6238a7ced) <= not repro
Version 2018.3.0f1 (f023c421e164) <= repro here

Still repro in trunk Version 2019.2.0a2 (e535fdfaaf49)

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