Is this new? "This script cannot be edited from the UI, because it is not stored in the 'scripts.yaml' file."

Configuration
1

This script cannot be edited from the UI, because it is not stored in the ‘scripts.yaml’ file.

Migrate script?
You can migrate this script, so it can be edited from the UI.
After it is migrated and you have saved it, you will have to manually
delete your old script from your configuration.
Do you want to migrate this script?

I’ve always created my scripts in YAML and this time I get this message upon clicking on “Save”. Why now?

2

You mean “in UI writing a yaml code”.

3

Is this new? “This script cannot be edited from the UI, because it is not stored in the ‘scripts.yaml’ file.”

No.
Been there as long as there’s been a script editor UI.