This article is to explain and solve the following error message:
The uploaded template is transformation enabled, but the existing one is not.
This error happens when you try to replace an old document that was originally created with the old plugin configuration, with a new document that has been created or uses the new Template Designer features.
We prevent the replacement of such document to avoid ending up with broken or corrupted documents.
Instead of replacing an existing document, delete the old one, upload the new one.