Can't change legacy raid with oUF Slim

[scrable]

As you can see here, I can't change the legacy difficulty, as it is greyed out and unclickable. I've narrowed this down to oUF Slim, but I'm unsure of how to fix it. I know this addon has been out of date for a while but I've managed to keep it alive for myself. Naturally, this probably has to do with how the drop down menu is created, but I don't know enough lua to fix it myself. This is the current code which I assume handles the menu:

local dropdown = CreateFrame("Frame", "MyAddOnUnitDropDownMenu", UIParent, "UIDropDownMenuTemplate")
UIDropDownMenu_Initialize(dropdown, function(self)
	local unit = self:GetParent().unit
	if not unit then return end

	local menu, name, id
	if UnitIsUnit(unit, "player") then
		menu = "SELF"
	elseif UnitIsUnit(unit, "vehicle") then
		menu = "VEHICLE"
	elseif UnitIsUnit(unit, "pet") then
		menu = "PET"
	elseif UnitIsPlayer(unit) then
		id = UnitInRaid(unit)
		if id then
			menu = "RAID_PLAYER"
			name = GetRaidRosterInfo(id)
		elseif UnitInParty(unit) then
			menu = "PARTY"
		else
			menu = "PLAYER"
		end
	else
		menu = "TARGET"
		name = RAID_TARGET_ICON
	end
	if menu then
		UnitPopup_ShowMenu(self, menu, unit, name, id)
	end
end, "MENU")

local menu = function(self)
	dropdown:SetParent(self)
	ToggleDropDownMenu(1, nil, dropdown, "cursor", 0, 0)
end

Any help with this would be greatly appreciated

[Phanx]

You don't need any of that code anymore. Just delete it. Also, find where the layout sets the frame's type2 attribute to "menu" and delete that too. oUF already handles menus for you, by setting the type2 attribute to "togglemenu", which tells the default UI to select and show the proper menu for the frame's unit for you.

[scrable]

Thank you for such a fast response and explanation. Got rid of the code mentioned and it works perfectly, thank you.