Collections: Moved object from one collection to another, data left behind?

Hey BA,
I’ve been organizing a scene into collections and have come across something I haven’t seen before. I moved a few objects from one collection to another, but it seems that something is being left behind in the original collection. The object name is grayed out, but when selected it selects the object in the proper collection. Any ideas how to clean this up and what causes this?

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Posted on Reddit’s r/blenderhelp as well and got an answer. Turns out that is due to the objects being children. As soon as I unparented, they went away.