make a new save, then load that new save (just in case), open console,
and see if that works. If not, you still have your old save.
*edit: had the value incorrect.. ali_ft1 should be false (0), and not true. I've changed the value in the code block to reflect this. Seems the author is using a reverse boolean (false = occurred, true = not occurred).
Anyway, I've modified (I hope) a fixed save, and hope you can carry on. You might not get the achievement though, since I think it's triggered and recorded in the persistence file.