Script broken, will not move on after if-check. How to fix?

wait(15)
if f.Backpack.GameState.Value == 1 then 
Game.Lighting.BeginnerSword:Clone().Parent = f.Backpack wait(0.1)
f.Backpack.GameState:Destroy()
end
wait(.1)
H = Instance.new("Hint")
H.Parent = game.Workspace
time = 122
Game_Launch_Part_Three()
end)()
t = t + 1 if t > #spawns then t = 1 
end
end
wait(.1)
end

Basically it will not keep on moving after the if check and it will stop at the if-check. How do I keep the script moving. I mean simply, if the script cannot find that GameState.Value == 1 in a player's backpack then it will simply move on. But it is not doing that. Why?

19:36:14.440 - GameState is not a valid member of Backpack
19:36:14.441 - Script 'Workspace.OvEngine(Game Script)', Line 108
19:36:14.442 - Stack End

That is the output.

if f.Backpack.GameState.Value == 1 then  ----Line 108
Game.Lighting.BeginnerSword:Clone().Parent = f.Backpack wait(0.1)
f.Backpack.GameState:Destroy()
end
H = Instance.new("Hint")
H.Parent = game.Workspace
time = 122
Game_Launch_Part_Three()
end)()
t = t + 1 if t > #spawns then t = 1 
end
end
wait(.1)
end

F is basically this:

for k, f in pairs(Game.Players:GetPlayers()) do coroutine.wrap(function() 
local blcks = spawns[t]
GameState = Instance.new("IntValue")
GameState.Parent = f.Backpack
GameState.Name = "GameState"
f.Backpack.GameState.Value = 1
f.Character.Torso.CFrame = CFrame.new(Vector3.new(blcks.Position.x,blcks.Position.y+3,blcks.Position.z))
f.Character.Humanoid.WalkSpeed = 0 

There, can you tell me what the problem is now?