INV_MO_LINE_DETAIL_UTIL.reduce_allocation_quantity (API is not working)

Experts-  Please help in me in reducing the allocated quantity on the move order -

1. This sale order has been released & move order is pre-approved with quantity allocated quantity on the move order & MTL_MATERIAL_TRANSACTIONS_TEMP.

2. From the move order form I have the ability to update the allocation but I wan to update through API

3. I am using below API it's reducing the allocated quantity on the move order but parallelly it's deleting the records from MTL_MATERIAL_TRANSACTIONS_TEMP.

DECLARE

    x_return_status       VARCHAR2(4000);

    p_secondary_quantity  NUMBER;

    p_quantity            NUMBER;

    p_transaction_temp_id NUMBER;

BEGIN

inv_mo_line_detail_util