Scarf knit by my mom, blocking.
My Minimalist cardigan, with a miscrossed cable. D'oh.
All other stitches held in place on needles, dropped the six cable stitches back down to the miscrossed row. Used a spare needle to pick up those stitches and then knit them back up, row by row, with the horizontal yarn that was just waiting to be used again. Slightly fiddly, but better than re-knitting all the way across all those rows.