Fixed a major bug where Pokémon received via Mystery Gift were not registered in the Pokédex if the player exited the game without saving immediately. Judge Function Symbols:

Which Eevee evolutions are available in Let's Go Eevee? - Facebook

Happy hunting, trainers

The "v10" could refer to a specific version of the game or an update patch. Nintendo periodically releases updates for their games to fix bugs, add features, or enhance online play.