First update after App transfer to new account

Hi,
Recently I have transfert my app to new account... Im try do the first update on the new account. When send binary to iTunes connect, I receive warning and a potential lost keychain access. (is OKI because not use it)

But when im build app and try put it my iPhone, if iPhone have App Store version of App with OLD identifier, I receive an error, Unable to install app on device, This application’s application-identifier entitlement does not match...

After I publish my update on App Store with NEW IDENTIFIER, when user will update my game it will work or user will receive an update error ??? (because the identifier will not match)

Thanks