How to solve an impossible WalkSpeed error?

--onlineone

--Varaibles
char = script.Parent;
hum = char:WaitForChild("Humanoid");

UIS = game:GetService("UserInputService");
RS = game:GetService("ReplicatedStorage");
Remote = RS:WaitForChild("Remote");
UpdateWalkSpeed = Remote:WaitForChild("UpdateWalkSpeed");

speeds = {}
numSpeeds = 0;
callRestart = false;

--Functions
function Speed()print("1")
    numSpeeds = numSpeeds + 1;

    local function Restart() print(2)
        for i, speed in pairs(speeds)do print(3)
            if(numSpeeds > 1)then print("call restart")
                callRestart = true;
                numSpeeds = numSpeeds - 1;

                break;
            end

            if(callRestart == true)then print("restarting")
                callRestart = false;

                if(i > 1)then
                    UpdateWalkSpeed:FireServer(hum.WalkSpeed / speeds[i - 1]);----WON'T PUT THIS VALUE IN NO MATTER WHEN
                    print(hum.WalkSpeed)print("/")print(speeds[i-1])print(hum.WalkSpeed / speeds[i - 1])
                end
                print("WALKSPEED:" .. hum.WalkSpeed)

                Restart();

                break;
            end

            if(i > 1)then
                UpdateWalkSpeed:FireServer((hum.WalkSpeed / speeds[i - 1]) * speeds[i]);
                print(hum.WalkSpeed / speeds[i - 1])print("*")print(speeds[i])print((hum.WalkSpeed / speeds[i - 1]) * speeds[i])
            else
                UpdateWalkSpeed:FireServer(hum.WalkSpeed * speeds[i]);
                print(hum.WalkSpeed)print("*")print(speeds[i])print(hum.WalkSpeed * speeds[i])
            end

            wait(0.05 * i);

            if(i == #speeds)then
                numSpeeds = numSpeeds - 1;
            end
        end
    end

    Restart();
end

UIS.InputBegan:Connect(function(input)
    if(input.KeyCode == Enum.KeyCode.LeftShift and
        hum.WalkSpeed ~= 0)then print("firing")
        Speed();
    end
end)

--Body
for i = 1, 4 do
    table.insert(speeds, i, 1 + (0.35 / i));
end

table.insert(speeds, 5, 1);

The line that says, WON'T PUT THIS VALUE IN NO MATTER WHEN, is the line with the error. The code seemingly updates the player walkspeed, identical to every other time the script does it. However, the feedback shows the following:

restarting 18.800001144409 / 1.175 16.000000973965 WALKSPEED:18.800001144409

The code understands to turn the walkspeed back to 16. It does so, but then, the very next second, it turns back to 18.8. I've tried adding waits everywhere, putting the UpdateWalkSpeed:FireServer in a separate function and calling it from far away, moving it. But no matter how I divide or where I move that line of code ``UpdateWalkSpeed:FireServer(hum.WalkSpeed / speeds[i - 1]); It doesn't change its flawed result. Please, I've been up for the last 3 hours (it's 2:41 am currently) pondering what the possible source of this error could be. I would appreciate it more than anything if someone else knows the solution. Thanks!! :)