We have one case of a dataset that contains both embargoed and non-embargoed images:
TrumanWood2018public contains two images that are also in TrumanWood2018. In P2, datasets that are embargoed are deleted in their entirety - which means those two images get deleted, when TrumanWood2018 gets deleted.
This pattern should be replaced by another approach - I suggest moving the non-embargoed neurons over to the public set rather than referencing them from both.