Over in osm.org/changeset/38693326 I said:

Hi, Please don’t add test data to the live database. If you want to test API calls, you can do them with http://api06.dev.openstreetmap.org/ .

You’re still doing it!

It’s possible that you never saw the original message because your email is broken, so I’m sending this as a message that has to be read before you can continue editing. Once you’ve read it you’ll be able to continue editing, but please don’t add test data to the live database!

Best Regards, Andy Townsend (SomeOneElse) on behalf of OpenStreetMap’s Data Working Group