I don't see how this solution will work.
We issued the invoice BEFORE we started tracking the inventory for the item. When I try to change the START value, it won't allow me to set any q'ty or any date BEFORE that invoice was issued. The error is quite clear:
"Please select a date that comes AFTER the last transaction that used this item when you weren’t tracking it as inventory."
HOW CAN I SET A STARTING VALUE BEFORE THAT INVOICE?