Why is the = sign underlined in red?

Im trying to make a script that changes the image in a box, but when I do this it underlines the equals in red saying then expected recieved =

local id = script.Parent.Value
local imageholder = script.Parent.One

activation:GetPropertyChangedSignal("Value"):connect(function()
	if id.Value = 1 then -- error here
		imageholder.Image =
	end
end

I realized my answer recognized the wrong thing, and I have since then edited it.

Question

Why is the = sign underlined in red?

Answer

You have a syntax error. When you're comparing a value to another you use double equal signs.

if someValue == otherValue then

end

You need to set = 1 to == 1