Setting the parent of a transform which resides in a Prefab Asset is disabled to prevent data corruption error is thrown on adding Particle System from its Prefab Editor.

Steps to repro:
1. Create a new project.
2. Gameobject > Effects > Particle System.
3. Create a prefab of Particle System.
4. Inspector > Open Editor > Click on "+".

Actual Result:
Prefab Asset is disabled to prevent data corruption error in the console.

Expected Result:
No error in the console.

Reproducible in:
2021.1.0a2, 2021.1.0a1, 2020.2.0b9, 2020.1.10f1, 2019.4.12f1, 2019.2.0a10, 2018.4.24f1.

Note: Properties do not display in the Inspector in 2019.2.0a9.

Environment:
Occurring on Windows 10 & Mac 10.15.

Stacktrace:
Setting the parent of a transform which resides in a Prefab Asset is disabled to prevent data corruption (GameObject: 'Particle System 2').
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&)