CRISPR gene editing can cause hundreds of unintended mutations

I'm a programmer who's been programming for a long time. The worst type of project for me is to go into a pile of code and start making changes. Many times I can get away with it but most of the time I pay by breaking the code then or finding the trouble later.

The genome is no different. If you make changes at one point you're bound to get unintended consequences. This article does not surprise me. The big problem is that we can't back up and start over.

We think now that global warming or nuclear weapons are the problem but the real threat is something we don't expect. Like screwing up our biological environment by changing the genome without knowing enough about the consequences.

Does anyone know how to backup and restore that?