The state for which this is taxable income is your state of residence at the time of the distribution. Unless the date of the distribution was 12/31/2018, your state of residence on 12/31/2018 is irrelevant.
Contact the payer for explanation. I suspect that only one of these Forms 1099-R is correct and that the payer voided the other before ever sending it to the IRS. That's not the best way to handle this unless they provide you with explicit instructions to destroy the original since it causes the confusion that you are experiencing. Ideally they would just issue a corrected Form 1099-R, file both the original and the corrected forms with the IRS, and you would prepare your tax return using only the corrected form.
