Changes During Goods Issue 
You control how the system reacts to changes during goods issue posting by making settings in Customizing under 
Logistics - General 
SAP Fashion Management Order Allocation Run Cross-Applications Goods Issue Handling 
.
Prerequisites
You have assigned a deallocation rule to the relevant plant in Customizing under
Logistics - General SAP Fashion Management Order Allocation Run Cross-Applications Goods Issue Handling Assign Goods Issue Rules to Plants .You have activated automatic deallocation for the goods issue at movement type level in Customizing under
Logistics - General SAP Fashion Management Order Allocation Run Cross-Applications Goods Issue Handling Activate Deallocation Per Movement Type .
Process
Deallocation Rule
In order allocation run Customizing for Goods Issue Handling, you can define deallocation rules to be used during goods issue. These rules determine whether the deallocation is permitted or not when the original quantity of an order is modified. You can choose one of the following actions for the Quantity field check:
D Deallocation Without Warnings: Order is deallocated completely without any warnings.
W Warnings Before Deallocation: A warning message is displayed and the order is deallocated completely.
E Change Not Permitted: You cannot modify an order and deallocation is not possible.
Requirement Sort Rule
In ARun Customizing for Goods Issue Handling, you can define how the system sorts requirements during deallocation. You can use this sort rule to specify the order in which requirements are deallocated. For example, the requirement with the latest open-to-deliver date is deallocated first.
Log Rule
The log rule determines the log file rule to be used for actions taken by the system during Goods Issue Handling. You can define the log file rule in Customizing under Logistics - General SAP Fashion Management Order Allocation Run (ARun) Online ARun Log Maintain Log Rules .
You can use the log rule to determine which of the following exceptions are included in the log.
All messages
Only error messages
Only warning messages
Errors and warnings
Assign Goods Issue Rules to Plants
You can assign a deallocation rule, requirement sorting rule, and logging rule to a plant. You can do this in Customizing under Logistics - General SAP Fashion Management Order Allocation Run Cross-Applications Goods Issue Handling -> Assign Goods Issue Rules to Plants
Activate Deallocation Per Movement Type
You can activate the deallocation function for each individual movement type. In this case, the system automatically deallocates stock during goods issue when you assign the goods issue deallocation rules to a plant.