KafkIO: unable to create new "old" versions of schema in schema registry, no error

I am creating a new schema in KafkIO and I am unable to create new schemas sometimes. Simplest example, let's say I create a simple schema, version 1:

Create simple schema

Then I create a new schema by adding a field, version 2:

Add new field, create new version of schema

Then if I remove that new field for some reason, and try to create a new schema, I get this "success" message but it still refers to version "2", and there's still just two schemas, not three:

Remove that new field

KafkIO shows just two schemas, not three

It's probably because the "new" schema is a duplicate of an old one, but this seems like a bug.

This is not a bug or related to KafkIO. This is how the Schema Registry behaves when you create "duplicate" versions of a schema. Rather than creating a new one, with a new ID, it does a noop, basically, knowing there's already that schema there. There is no need or advantage in creating another resource/schema ID.