You create a canvas app. The current version of the app is 16. You identify a mistake in version 16 of the app. You restore a previous version of the canvas app. You need to inform others which…

Version 15 is an older historical version that predates version 16 and any subsequent restore operation, making it outdated for active development.

Version 16 is the version that contains the identified mistake and should not be used as the basis for further development.

In Power Apps, restoring a previous version does not overwrite the current version but instead saves the restored copy as a new version by incrementing the highest existing version number. Since version 16 is the current version when the restore is performed, the restored copy is published as version 17. Developers should use version 17 because it is the latest saved state with the faulty version 16 superseded.

Version 20 does not exist in this scenario; the restore operation only creates the next sequential version number, which is 17.