Migration form latest owncloud to latest NC: "Updates between multiple major versions and downgrades are not supported"

Migration from OC to latest NC 16.0.3

Migration Script runs fine, upgrade process fails with the message above.

I read trough the other similar post but could not find a soltuion, unfortunately.

Nobody any idea?

It seems that the migration tool needs an update for newer versions:

thanks for your reply. How can I check if update for migration script is requested, already?