Mouse.Target refers to the player and not the target?

When I was testing my gun, it damaged me than the person that I was shooting, Why? Any way to fix it?
Gun script:

local debounce = false
script.Parent.Parent.Equipped:Connect(function(mouse)
    mouse.Button1Down:Connect(function(idk)
        if debounce then else
            ******************:FireServer(mouse.Target.Parent)
            debounce = true
            wait(1)
            debounce = false
        end
    end)
end)

RemoteEvent script:

script.Parent.OnServerEvent:Connect(function(key)
    if workspace[key.Name]:FindFirstChild("Humanoid") then
        workspace[key.Name].Humanoid:TakeDamage(10)
    end
end)

Thank you in advance!