I can't save the translation content and this error message is displayed after hitting the save as draft: Non-translatable fields can only be changed when updating the current revision.
Here's the steps I performed: 1.) Click edit tab on the original language, and edit the content, then save as draft. Actual Result: The content was successfully saved 2.) Go to translation tab and edit the translation language then do modify the content and click the save as draft: Actual Result: This error was displayed: Non-translatable fields can only be changed when updating the current revision.