Parenting weld changing player position

[bleintant]

When I parent a weld, the player’s position changes by about 3 studs each time.

Here is my code(the prints are the player’s position throughout the code):

local function showKillzone(target)
	
	if target.Parent:FindFirstChild("Humanoid") then
		
		if selectedTarget == target.Parent then return end
		if selectedTarget then
			removeSelected()
		end
		
		local player = Players:GetPlayerFromCharacter(target.Parent)
		if not player then return end
		
		print(player.Name)
		
		--[[local rankInGroup = player:GetRankInGroup(groupID)
		local studSize = getKillzoneStudSize(rankInGroup)
		
		if not studSize then return end
		
		print(studSize)--]]
		
		local char = target.Parent
		
		local weld = Instance.new("Weld")
		local HRP = char:FindFirstChild("HumanoidRootPart")
		if not HRP then return end
		
		local clone = Parts.Killzone:Clone()
		
		print(HRP.Position)
		
		clone.CanCollide = false
		clone.CanTouch = false
		--clone.Size = Vector3.new(studSize, killzoneThickness, studSize)
		
		print(HRP.Position)
		
		clone.Size = Vector3.new(7, killzoneThickness, 7)
		clone.CFrame = HRP.CFrame
		
		clone.Parent = char
		
		print(HRP.Position)
		
		weld.Part0 = clone
		weld.Part1 = HRP
		
		print(HRP.Position)
		
		weld.C0 = clone.CFrame
		weld.C1 = HRP.CFrame * CFrame.new(0, -2.75, 0)
		
		
		print(HRP.Position)
		
		weld.Parent = char --For some reason this line needs fixing
		
		print(HRP.Position)
		
		selectedTarget = target.Parent
	else
		if selectedTarget and workspace:FindFirstChild(selectedTarget.Name) then
			removeSelected()
		end
	end
end

And here is what the print statement is

Line 96 is line weld.Parent = char.

[snowingwings220]

Try using WeldConstraints instead.

[wastbo (DanCodes)]

The part zero should be the hrp, not the part you are trying to weld to it

[bleintant]

Doing that just makes the player go into the ground for some reason.

[bleintant]

Switching to WeldConstraints fixed the problem almost instantly!