[Linphone-users] What is a "contact modification"

[ael]

I have searched for any documentation on the linphone GUI (desktop)
and found nothing.

The panel icon started flashing a digit ("1").
I clicked on it and this just hid the main linphone window.
Clicked again and restored the window. So no change in the normal icon 
action.

Looked at the main window and discoverd the same digit showing for one
of the contacts. Clicked on the digit (1) and was presented with
the rather baffling 
"Are you sure that you want to cancel the contact modification?"

What contact modification? Who or what is trying to modify a contact?
Why?

I think there was a missed incoming call from that number.

Weird. Can anyone point at some documentation or explain what this is
mean to mean or do?

Desktop  - Qt5.15.2, Core 4.4.21 if this matters.

ael