A Dictionary override on a Prefab instance is applied to the wrong key when an entry is removed from the Prefab asset

How to reproduce:

1. Open the “IN-148914_DictOverrideRepro” project
2. Open the “ReproScene” Scene
3. In the Hierarchy tab, open the “DictHolder (instance with override)” Prefab by clicking the arrow (“>”) next to “DictHolder (instance with override)” name
4. In Prefab Mode in the Hierarchy tab, select the “DictHolder” object
5. In the Inspector in the “Dict Holder (Script)” > “Data”, remove the “alpha” entry by selecting it and clicking “-” in the bottom-right corner
6. Save the Prefab (Ctrl+S) and exit Prefab by clicking the arrow (“<“) in the Hierarchy tab next to the “DictHolder” Prefab name
7. In the Hierarchy, select the “DictHolder (instance with override)” GameObject
8. Observe the results in the Inspector in “Dict Holder (Script)” > “Data”

Actual result: In “Dict Holder (Script)”, the override “Value” stays anchored to the same row position, but other values are pushed back
Expected result: The override “Value” is attached to the corresponding “Key”

Reproducible with: 6000.6.0a6, 6000.6.0b5, 6000.7.0a3
Could not test with: 6000.0.1f1, 6000.0.80f1, 6000.3.20f1, 6000.5.5f1, 6000.6.0a5 (serialized Dictionary field doesn't exist)

Reproducible on: Windows 11 Enterprise (25H2)
Not reproducible on: No other environments tested