Search Issue Tracker

Fixed in Unity 2017.3.0f3



Found in


Issue ID




Reverting model back to a prefab and then undoing these changes creates an additional broken non-prefab object

Scene Management



Priority: 2Necessary for shipping a final release


Severity: 1Crash, freeze, data loss, work stops

To reproduce:
1.Download and open attached project
2.Open "SimpleVoхelPack" folder
3.Go to scenes folder and open "Forest" Scene
4.Select any object from the scene except "ENVIRONMENT" object
5.Press revert button in the inspector
6.Press CTRL+Z to undo changes
7.Notice that 2 objects in the hierarchy with the same name are created
8.Select object which has the arrow to view its child objects and press that arrow

Reproduced with: 5.6.0b2, 5.5.0p3, 5.4.3p3, 5.3.7p2
Not reproduced with: 5.3.5f1, 5.2.5f1.

Expected result: Changes are reverted without additional object and Unity does not crash.
Actual result: Changes are reverted with additional object and editing this object causes editor to crash.

Note: bug only occurs when prefab connection of that model is broken.

Verified with: 2017.3.0b3

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.