Changing the Final Issue Indicator
Use
The final issue indicator is used to mark a reservation item as completed. It is set automatically during goods issue posting if the entire reserved quantity is withdrawn.
If the indicator is set for a reservation item, this item will no longer be suggested as selected for the goods issue.
Activities
If you want a reservation item to be considered completed by a particular goods issue despite the fact that the entire quantity was not issued, you can manually set the final issue indicator when you enter the goods issue item.

Entering goods issues with reference to a reservation is explained in detail in
There are other situations in which you can manually change the final issue indicator in the reservation, namely:
You can set or reset the final issue indicator for an item directly on the collective processing screen (FIs column) or on the detail screen (Final issue field).