I have crocheting problem can i cut it?

It really depends on how much you have done and how much further you have to go. First of all can you see where this all started? The reason is that if it's not too far it would be best if you pulled it down. If you have a ways to go you can do a 1 dc decrease at the beginning and end of a row. then do several more rows and do the same. You do know that with so many stitches eventually someone will make the remark that something it wrong with one of the blankets. So you have two choices. Rip it down and they will be the same or start decreasing the stitches. The decision will be yours but don't wait too long and do more on the blanket and then decide to make it right and have so much more work to do.