When I get moderated or muted it doesn't appear the name of the official moderator who made it, It just appears as "Inconnu_0". I've been searching this name in the player list and it appears as an internal error

I'm still asking this:
WHY THE INTERNAL ERROR?
Where's the origin behind this name?
What He/She/It does?

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Inconnu just means unknown in french.

Why is this name on the player list??
I think he's not a real player

inconnu_0 doesn’t actually exist.
that was from back then when removed posts would just say [Moderated], not [Moderated by _____].
when they added who moderated the posts, Inconnu_0 takes the place of the person’s user who moderated it, probably because the system doesnt know who moderated it.

A similar thing happens in Run For Cheese leaderboards, the difference is that instead of "0" there's another number.
The accounts aren't actually existing.