Procedural Mesh Component Blocks Level from Saving

When a blueprint is added to a level that contains a procedural mesh component the level is unable to save. The error message that pops up is attached as a screenshot.

Edit PatrickD (08-29-2016):
Compiling and saving the blueprint works as expected. Compile and save the blueprint, then put an instance of it in the level, then save the level, and the level specifically fails to save.

Edit MatthewC (8-29-2016):
Regession? YES
Reproduces in: 3095848
Does not reproduce in: 3064670

1. Open attached project (made in 4.13 preview 3)
2. Add PremadeMesh to the level
3. Save All

Alternate Repro Steps

1. Open Blank Project
2. Create Actor Blueprint
3. Add Procedural Mesh Component to BP
4. Add BluePrint to Level
5. Save All

RESULT
Error message and can't save Level.(See Screenshot)
EXPECTED
Level saves.

Fix UE-51650

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