2014 amendment filed in 2017 resulting in a federal and state refund. Should I file 2015 amendment to account for the state tax refund?

I recently filed an ammanedment to my 2014 returns which will result in a refund of both federal and state taxes. Since I've been using itemized deductions, any state tax refund is shown as income in the following years' return. Should I therefore file an adjustment to my 2015 returns, showing this refund of state taxes? Or should I include it as part of my next years tax return?