Cleaning Dawnguard.esm throws an error covering persistent references and child blocks

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What steps will reproduce the problem?

1. Open Dawnguard.esm in TES5Edit.
2. Set up the standard ITM/UDR cleaning filter.
3. Attempt to save the newly cleaned file.

What is the expected output?

The file should save and Edit should close as expected.

What do you see instead?

The following error:

[00:00] Saving: Dawnguard.esm.save.2012_10_01_00_21_02
[00:00] [Dawnguard.esm] Setting Persistent: [REFR:000CCE05] (places 
CounterLeanMarker [FURN:0006CF36] in GRUP Cell Temporary Children of 
WarehouseFurniture "Warehouse Furniture" [CELL:000CCDAA])
[00:00] Error saving Dawnguard.esm.save.2012_10_01_00_21_02: WarehouseFurniture 
"Warehouse Furniture" [CELL:000CCDAA] is not contained in a group of type 
"World Childen" or "Exterior Cell Sub-Block"
[00:00] Errors have occured. At least one file was not saved.

TES5Edit beta version 3.0.22a, Windows 7 Home Premium x64.

This was in an interior cell (000CCDAA) in which the master records from 
Skyrim.esm are marked as persistent but the edited records in Dawnguard.esm are 
not. The change in this flag is the only visible difference seen. REFR 000CCE05 
and 000CCE09.

Original issue reported on code.google.com by arthmoor on 2 Oct 2012 at 12:26

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Original comment by danielhmpdx16@gmail.com on 5 Oct 2012 at 2:05

• Added labels: Review-TES5Edit

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Original comment by zila...@gmail.com on 13 Oct 2012 at 5:56

• Changed state: Fixed