# UpdatePrefabInstances

> A change of this type indicates that prefab instances in an open scene have been updated due to a change to the source prefab.

## Definition

* **Type:** Field
* **Namespace:** [UnityEditor](/engine/6000.7/script-reference/unityeditor.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
UpdatePrefabInstances = 11
```