How do I choose an older DA version after selecting a later one in Projects config UI?

Unable to select older version of deployable architure in Projects config UI.

In the IBM Projects config UI, you have selected a specific version of the deployable architecure to update to and clicked 'Save', however you now wish to choose and older version but the version dropdown is greyed out.

After choosing a new version in the Projects config UI, the version becomes locked while config changes, or validation occurs on it.

Providing you have not proceeding with a deploy of the new version, you can change the version in the dropdown box by following these steps:

• Locate the menu icon (three-dot symbol) on the top right of the projects config page and click it.
• Choose to 'Discard edits'.
• Click 'Discard' to proceed.
• The version dropdown box becomes active again and a different version can be selected.