3431376 - SES Account Assignment Distribution by amount

Creating a Service Entry Sheet in the APP 'Manage Service Entry Sheets' when a user tries to set 
a multiple account assignment choosing option "Distribution by Amount" the system raises error 
"Distribution by Amount" only selectable if used in the purchase order. (MM_PUR_SES081) 

SAP S/4Hana Cloud 

Open the APP 'Manage Service Entry Sheets'. 
Choose Create and enter a reference purchase Order. 
Enter the mandatory data and navigate into the item. 
In the item general information set an account assignment category and choose "Distribution by Amount"
The error is raised as below image: 

Standard System Behaviour 
It is only possible to use the option "Distribution by Amount" when it is already set in the reference purchase order item. 

- Change the account assignment details in the reference purchase order before continuing to create the service entry sheet. 
- As indicated in the error message you can use the other types "Single Account Assignment" or "Distribution by Percentage" or "Distribution by Quantity".

MAA, VPROZ, VRTKZ , KBA , MM-PUR-SVC-SES , Service Entry Sheet for Service Procurement , Problem