I'm not sure setting an ID would work in this case since it just can't seem to decode Credit to credit, but another user also suggested a migration plan. I'll look into that. Thanks.

Thank you for your reply. I'll look into those.

Thanks for your reply. That's a good way to do it.

Thanks. Yea I don't have it there at the moment, but it doesn't see to make much of a difference anyways. Either way, I figured out how to do what I wanted to do. I'm going to post the code for it.

That did it. I figured if I didn't want to select multiple, I could just use the UUID without using the set. I did have to adjust other parts of my code to get the navigationDestination to work though. I'll post that code as a comment.

I ended up reverting back to MacOS 15 to use the stable release of Xcode.

Was able to confirm that there is no lag with 17.6.1 as well.

@Claude31 The purpose is to give the view a separate model to edit so no changes are made to the original until the user presses a "done" button. At that point, the original is updated and the context is saved. I used to do it differently, however, SwiftData doesn't always behave how you expect it to and I remember having some issues. Yes, mileageHistory is an array of Mileage. I'll update the post to have more information on the Vehicle structure.