HaloMods "Classic" Read-only Archive

Okay, so I'm using a clean map, and every time I try to import a new model in darkmatter, it shows the new model, then I add the meta to the map, it makes the new tag, and it's exactly the same as the old one. It does this for all maps, all models. I used to be able to do this, but I remember doing exactly what I do now. How do I get the changes to show up? Any help will be appreciated.

did u replace all the [001] [002] extc. with that of the new model?

Yes. Like I said, the changes show up in the model viewer, until I add the meta to the map. Then I just have two models that look exactly the same. When I use Entity, it gives me an error when I try to save the meta.