Why does the attacking Player taking damage from their own weapon/gun?

Hello there! I was wondering why your own gun does damage to you instead of your target, like a dummy for example. This is really something that I don't know how to script, so I would appreciate it if I got some help; Thanks! More Info below!

-- Variables
local TweenService = game:GetService("TweenService")
local Tweeninfo = TweenInfo.new(0.3, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0)
-- Scripting in Action
script.Parent.ShootEvent.OnServerEvent:Connect(function(player, caster, position)
	local rayOrigin = caster.Position
	local rayDirection = position
	
	local rayParams = RaycastParams.new()
	rayParams.FilterDescendantsInstances = {player.Character}
	rayParams.FilterType = Enum.RaycastFilterType.Blacklist
	
	local rayResult = game.Workspace:Raycast(rayOrigin, (position - script.Parent.Handle.Position) * 200, rayParams)
	
	local hittedPart = rayResult.Instance
	
	local bullet = Instance.new("Part", game.Workspace)
	bullet.Size = Vector3.new(0.25, 0.25, 0.25)
	bullet.Shape = Enum.PartType.Cylinder
	bullet.Position = script.Parent.PistolModel.Flash.Position
	bullet.BrickColor = BrickColor.new("Gold")
	
	local TweenTo = {CFrame = CFrame.new(position)}
	
	local TweenBullet = TweenService:Create(bullet, Tweeninfo, TweenTo)
	
	TweenBullet:Play()
	
	if hittedPart.Parent:IsA("Model") then
		bullet.Touched:Connect(function(hit)
			local charcter = hit.Parent
			
			local humanoid = charcter:FindFirstChild("Humanoid")
			
			if humanoid then
				bullet:Destroy()
				if hittedPart.Name == "Head" then
					humanoid:TakeDamage(25)
					print("Headshot Acquired!")
				else
					humanoid:TakeDamage(16)
					print("Shot!")
				end
			else
				wait(5)
				bullet:Destroy()
			end
		end)
	end
	
end)

Edit: I marked your answer correct, I've used another source of information to help out with my scripting problem, a DevForum post, but anyway thanks for trying to help! I really appreciate it!