Crash attempting to convert World comp to world composition through commandlet

After doing a few sub-levels, it hits this

[2021.06.13-19.38.14:253][ 0]LogWindows: Error: === Critical error: ===
[2021.06.13-19.38.14:253][ 0]LogWindows: Error:
[2021.06.13-19.38.14:253][ 0]LogWindows: Error: Assertion failed: Actor->GetOuter() == SubLevel [File:D:/Ascendant/UE5/Engine/Source/Editor/UnrealEd/Private/Commandlets/WorldPartitionConvertCommandlet.cpp] [Line: 1220]
[2021.06.13-19.38.14:253][ 0]LogWindows: Error:

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