I was in Manfacturing > Products > Create new In the Inventory subcategory. Developer Mode: On

I was trying to add a field to the Inventory subcategory. I added a new field (name) inside "Counter-Part Locations Properties". And another field (also name) inside <weights>. When I went back to the page, I noticed that several groups disappeared from the Inventory, and only one remains: Status.

I went back to Manage Views, deleted the two fields I had created earlier, and went back to my page, and I still only have Status in Inventory. I closed my browser, restarted the services, re-opened..and nothing happened.

So how do I get the groups that disappeared back? And what did I do wrong?