Constantly Getting Error From Discord ( I think)

[Koren]

Every time I mouse over one of my DUF Units I get an error. It happens if it is my player frame or anyone in my party.

[2008/01/09 16:11:16-1493-x27]: Interface\FrameXML\UnitFrame.lua:93: Usage: GameTooltip:SetUnit("unit"):
Interface\FrameXML\UnitFrame.lua:93: in function `UnitFrame_UpdateTooltip':
Interface\FrameXML\UnitFrame.lua:77: in function `UnitFrame_OnEnter':
DiscordUnitFrames\DUF_Element.lua:254: in function `DUF_Element_OnEnter'
<string>:"*:OnEnter":1: in function <[string "*:OnEnter"]:1>

this is the error I keep getting. Any ideas?