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Understand the error::
The 2819-0003 code appears when a Nintendo account in a secondary console To perform a game that is used at the same time on another console Online. This It is no longer possible for update 20.0.0. -
Check which console is saved as the main::
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Access Nintendo Eshop with your Nintendo account.
Other content in this category:
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Check which console is saved as Main console.
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Close the session or stop using the Nintendo account in secondary consoles::
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If you use the account in a console is not the mainStop using it to run games or digital content.
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Close the game or program that generates error.
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Take the game back in the main console::
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(Optional) modifies the main console if you need it::
If you want another console (for example, switch B) is the main thing:-
Disable the current console as the main on the Nintendo website.
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Connect the new console and access the eShop to automatically record this console main.
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What do you think? Source.



