While deploying App via CLI getting warning about removing "Registration title"

While attempting to deploy a Shopify App that simply contains a Theme App Extension with a single block inside of it, I am getting a notification in the CLI that this will remove an extension called “Registration title” (see below).

Release a new version of theme-customizations-2?
Includes:
+ theme-extensions
Removes:
- Registration title
- Registration title
- Registration title
- Registration title
- Registration title
This can permanently delete app user data.

There is no extension by this name inside the app both in our local code and in Partners and never has been. I cannot find any mention of this in the Dev Docs, the community forums here, or anywhere online. I was hoping @Shopify_77 might have some insight before I attempt to push this up and/or was wondering if anyone else has encountered this.