InTM doesn't auto translate terms if the source key has been updated

In project A I have a source translation like this :

language: 'en'
key: ''
value: 'Save'

If I rename this key into '' and I left the value unchanged, all the languages have to translate it again. The only help from InTm is it prefill the translation with a suggestion.

Can the translation be automatically approved?
What’s the best practice to rename a source key?