Newer game updates are compiled using newer Nintendo SDKs, which require recent official system firmware versions.

Troubleshooting the Namco Museum Arcade Pac Switch NSP Update Work Issues

Sometimes the Switch OS remembers that a newer update exists, blocking you from playing an older version if your update file didn't register correctly. Open or use DBI .

and then re-accessing the eShop helped "refresh" their virtual game card and DLC list. Region Check