The information on the iPhone [device name] is synced with another user account.
I have the problem pretty well described in this previous question:
https://discussions.apple.com/thread/252991916?sortBy=best
But there is not any usable analysis of this problem.
I will try to do this up to a real solution.
My Mac ( noether ) and my iPhone ( panthere ) have been synchronized since their first contact
with iTunes through an USB cable.
Here is how is configured my synchronization between my Mac and my iPhone:
Here is the error message I have, just since I upgraded to Big Sur, when I click on the button [Apply]:
What is the "user account" mentionned in this error message?
Where are the log associated with the process running this synchronization
initial configuration where one could find some more intelligent information?
I am a system engineer, then feel free to talk of command line ( I am mainly working with command line ).
MacBook Pro 15″