Haha no I don't think it is worth it, as good as it is. It's just a little white line across the dog's face. Didn't touch the actual record. And I have a digital copy as well. I don't plan on selling it (it most likely wouldn't go for much money even after its out of print anyway), so I don't really have to worry about any value loss.
I could probably find some sort of marker or something that doesn't look like too obvious of a touch up job.