Expected BasePart got Model for Weld:Part1. how do i fix this?

this is my code if you need it

game.Players.PlayerAdded:Connect(function(player)
    player.CharacterAppearanceLoaded:Connect(function(char)

        local h = game:GetService("ServerStorage"):FindFirstChild("KatanaModel"):Clone()
        if not char:IsA("Model") then return end

        local rHand = char:FindFirstChild("RightHand")
        h:SetPrimaryPartCFrame(rHand.CFrame * CFrame.Angles(math.rad(-90), math.rad(0), math.rad(0)))

        local weld = Instance.new("Weld")
        weld.Part0 = rHand
        weld.Part1 = char

        weld.Name "HandleWeld"
        weld.Parent = rHand
        h.Parent = char
    end)
end)