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Yes, you will probably have to cut the yarn and reattach it when you get to that side. You can put those stitches on a stitch holder or piece of waste yarn. I prefer waste yarn to holders myself. Take a yarn needle and a smooth, thinner yarn and thread it through the stitches with a yarn needle. Leave it long enough to tie so it doesn't pull out. When it's time to do that side you can put the needles through and cut the knot and pull out the waste yarn and continue with new yarn.