: For official games and updates, always download from legitimate sources. Nintendo usually provides updates through its official channels.
Many automated tools, like Steam ROM Manager on Steam Deck, may incorrectly identify and link to an update NSP instead of the base game. the nsp file is missing a programtype nca upd
: If the file was not copied completely or was corrupted during download, it may be missing essential components. : For official games and updates, always download