I am posting my first AP batch for 2021 and received an error stating that the period is currently locked and posting is not allowed. We did not lock the period but I do see in Accounts Payable - Process Period End that there is an option for me to Unlock AP Period 1-2021 however when I select the option to do so, I receive a message telling me that unposted transactions exist. Do you still want to close the period? Obviously I do not want to close the period, I simply want to unlock the period. What do I do here?