The practical answer is that, since a rollover (indicated by code G as the distribution code) will not affect your taxable income or income taxes, and there is no need for you to file an amended return. Do keep the 1099-R with your other 2016 tax records.
Please be aware that, due to the IRS matching system, you may receive a notice. If this does happen, you can respond with a simple letter that states that the 1099-R does not affect your taxable income so no amended return was filed and send that back with a copy of your 1099-R.
