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)