argh!

I just finished knitting 198 stitches of 2-yellow-1-green and realised they should've been 2-yellow-1-green-3-yellow-1-green. Now, am I brave enough to pull it off the needles to undo, or should I try to be patient and unknit all those stitches? I guess now would be a good time to stop and go to bed, in any case.