macos – Password required to update Apple ID settings

My iPhone (under iOS 12.1) informs me that I must "Update the Apple ID settings" otherwise "Some account services will not be available until [I] Log in again. "

When I cast Adjustments > Update Apple ID settings First, iOS promises me my "Apple ID Password", then "iPhone Password" and then "Mac Password". The description of the last reading says: "Enter the password you use to unlock the Mac …".

What password does this refer to? I hesitate to write many passwords without better information about what is happening here. I have an iPhone and a MacBook and I use the same Apple ID account in both.