Retrieve cast on stitches

In error, i accidently tore out some of my cast on stitches, when I was supposed to be ripping out stitches that held front to back of sweater. Does anyone know how I can retrieve these cast on stitches.

Start over…? Or at least back up to where you cast them on.

Aw that’s too bad. I think you’ll have to start over. Consider it a lesson learned.

I’m not sure what she means by casting on to join back to front. If you were knitting in the round and cast on at an underam, you’d only need to go back to that point.