Hello,
We keep getting this error when trying to Issue Materials.

This is happening for all finished products we are making using the item 00029049, regardless of lot. We had previously made production orders using this item numerous dozens of times before, most recently just four months ago.
As I have highlighted, we have sufficient qty. On Hand, Available and Available for Shipping (we also have an equal amount as Available for Issue).
There is no qty. allocated:

We have checked the BOM and it is OK.
We have deleted and recreated the Production Orders (using various lots we have on hand to see if it was truly a warehouse, warehouse location or allocation issue - it is not).
The warehouse location allows sales. The location is the Default Issue From location for thousands of other items with no problem.
The stock item is Active.
We have Recalculated Inventory.
This seems totally random and nothing we have done is fixing it. We are well versed with production orders and how they work, including troubleshooting. Did I mention we make nearly 10,000 production orders a year? :)