You can create a version to store scenario and data before editing.
For example, you have created a Chatbot and want to archive this version. Go to Version on the menu> Press the [Create Version] button> Enter the version name> Click Save
Then, you edit, or set up new scenarios, you also save this version.
If you want to use a scenario, click the Restore icon to use
The mark on “Last used” is a status that you are using that version.