Tipp-ex

I have been having these dreams where I'm studying or writting something, and my Tipp-ex ends, not letting me finish cover-up what I mistakenly wrote. I keep having this dream, and everytime I pick my Tipp-ex to use it in real life, I remember the feeling in the dream of not having more correction tape.
I googled the meaning, but I couldn't find any.
If this was metaphore, I would say I trying to rewrite something and something is not letting me... But what?