Inventory item does not reduce as consume in Service Request Task completion in Debrief.

Hi guys

Inventory item does not  reduce as consume in Service Request Task completion in Debrief.

When Service Request is generated along with task ,  Now for task completion Field Service Technician require part item for completion of his task,

after completion of task physically, the user mention material consumption in task in debrief and change the status of task completed and then closed

Now if i  examine the inventory item qty  remain the same , for e.g if the item qty was 11  and  as 1  qty was consumed so after completion of Task the qty remain the same means

i,e. 11