Why do my Blueprint defaults not match new parent after reparent?

Reparenting preserves the child's overrides relative to the old parent. Properties that match old defaults but differ from new defaults remain as overrides. Click Reset to Default per property in Class Defaults to re-inherit from the new parent.

How do I reparent a Blueprint cleanly?

File > Reparent Blueprint. After reparenting, open Class Defaults, walk through each property, and reset any that you want to take new parent values. Save and recompile.

Why are some properties no longer in the inspector after reparent?

Properties existing only on the old parent disappear; the new parent has its own set. Components specific to the old parent remain on the BP if added, but inherited components from the old parent are gone.

Fix: Unreal Blueprint Class Default Not Applied After Reparent

Quick answer: Reparented Blueprints preserve their old overrides. Open Class Defaults; click Reset to Default on each property that should take the new parent value. Save and recompile.

Here is how to fix Unreal Blueprint defaults drifting from the new parent after reparenting. Overrides survive the move; you must reset to re-inherit.

The Symptom

You reparent BP_Goblin from AEnemyBase to AOgreBase. AOgreBase has DefaultHealth=200; BP_Goblin still shows 100 (from old parent override).

What Causes This

Override snapshot. When DefaultHealth was set on the original BP_Goblin, an override was stored. Reparenting does not clear it.

Per-property reset needed. No bulk reset; walk Class Defaults and reset each.

The Fix

Step 1: Open Class Defaults after reparent. Class Defaults panel shows yellow arrow icons next to overridden properties.

Step 2: Click Reset to Default per property. Each click re-inherits from the new parent. Save the BP after.

Step 3: Use editor scripting for batch reset.

# Python: reset all defaults to parent
import unreal

bp_path = "/Game/Blueprints/BP_Goblin"
asset = unreal.load_asset(bp_path)
cdo = unreal.get_class_default_object(asset.generated_class())
# For each UPROPERTY, set to the parent CDO's value

Useful for many BPs needing the same reparent treatment.

Step 4: Recompile and verify. File → Compile All Blueprints. Check derived BPs that inherit from the reparented one to ensure their defaults track correctly.

Step 5: Commit before reparenting. Reparent is hard to undo cleanly; have version control to roll back if needed.

“Yellow-arrow reset per property. Recompile. Defaults align to new parent.”

Related Issues

For child default inheritance, see Child Default. For data table runtime, see DataTable Runtime.

Reset to default. Recompile. Save. Defaults match new parent.