Slice

I think I f---ed up. While lapping the valves in my head, I managed to pull a burred valve through one of the guides. (actually I tapped through with a screwdriver and hammer because it was stuck)- dumb move I know but its done. Now I have a valve guide with a staight full length scratch that looks about as wide as if it had been done with a sheetrock knife. The seals are new. What should I do???