Thanks for the feedback.

Our date for the inventory Starting Value is March 1, 2022.

The date of our invoice is October 31, 2022.

We are still not able to change the invoice and get the same error message.

We tried deleting the new Product from the invoice and then re-adding it as a new line item on the original invoice. We then got this error message: "You need to activate this item before updating the quantity."

We then made the Product INACTIVE and then made it ACTIVE and we still get that error message now.

Help!