We have a project that we received a deposit / down payment and issued an Unconditional Progress Lien Release thru 4/30/17 with an amount of $247,031.25 & emailed to our customer on 7/18/17 and now they are asking for an Unconditional Progress thru 4/30/2018 for this same amount. I sent them the older one, but they keep asking us to change it to 4/30/2018. Would I be ok to give them what they want, as long as I do not give them the Unconditional Final!