Sure you can but do it, carefully. Just this afternoon I had quilt top in the barn raising style lay out finished. So I thought. I found an error in in the second row from the top in the middle, Flipped squares. Fixed carefully. Hung it up on my quilt wall and............Found another pair of flipped squares. They are in the middle of the top and four rows in from the left side. Tomorrow. So, pick it out the center squares carefully, press and add the new little square to your log cabin. blocks. A bother for sure, but you will be pleased in the end and you only have 6 to correct.
