error that i cannot seem to fix and fix attempts fail. so how does this work exactly?

I have this script to run pumps but after it runs the first time and tries to turn it on again it gives this message: "12:18:03.658 - Workspace.Pumps.Clickyboi.Script:8: attempt to index upvalue 'isiton' (a boolean value)" I have tried numerous times to try to fix this issue but it just keeps appearing.

local access = script.Parent.Parent
local pump1 = access.Pump1.Housing
local pump2 = access.Pump2.Housing
local isiton = true
local canbeactivated = true

script.Parent.ClickDetector.MouseClick:connect(function(TRIGGERED)
    if isiton.Value == false and canbeactivated == true
        then isiton = true
        canbeactivated = false
        pump1.On:Play()
        wait(3)
        pump2.On:Play()
        wait(3)
        pump1.Running:Play()
        wait(3)
        pump2.Running:Play()
        wait(3)
        canbeactivated = true   
        end
end)

script.Parent.ClickDetector.MouseClick:connect(function(LOL)
        if isiton.Value == true and canbeactivated == true then
        isiton = false
        pump1.Shutdown:Play()
        pump2.Shutdown:Play()
        pump1.Running:Stop()
        pump2.Running:Stop()
        wait(10)
        canbeactivated = true           end
end)