"Last user connected" in User preferences in Linux

[Manuel Luque]

I don’t understand the meaning of the field “last user connected” in the “User preferences” dialog in Linux. Since user’s preferences belong to the Linux user and are stored in his/her home directory (in a subfolder), then I think it wouldn’t make sense to store a preference value such as “last user connected”.

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I attach an screen of example with my Linux user.