3629511 - Allow Price Change indicator is greyed out in Purchase orders of lean services

Allow price change indicator is greyed out while creating or modifying the Purchase orders of lean services.
This checkbox specifies for a lean service item that the price can be changed during the service entry sheet creation. 

Note: Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

SAP S/4HANA Public Cloud Edition

1. Open app to Create or Modify Purchase order and provide all required details in the Purchase Order (PO).
2. Select the right line item and check Condition Control tab under Item Details in the purchase order. 
3. Check field "Allow Price Change" and its not modifiable or greyed out. 

The prerequisites required to activate the 'Allow Price Change' indicator have not been fulfilled.

Please check below list of pre-requisites and modify Purchase order or configurations accordingly.

1. Check if the respective line item is a standard item.
   
   
2. The respective item has to be Product Type Group=2 that is Service under Material Data tab in Item Details as shown below in the Purchase Orders.
   
   
   
3. Make sure that the line item in the Purchase Order is not linked to a contract or Material have any contract link to it.
   
   
4. Validate customizing for tolerance limit for Purchase order in SCCUI - 101726  Set Tolerance Limits for Price Variance.
   Make sure tolerance limit also not set to "Do not check" for Tolerance Key PE and SE. 
   If  tolerance limit is set to "Do not check" then "Allow Price Change" indicator will not work. 

https://help.sap.com/docs/SAP_S4HANA_CLOUD/0e602d466b99490187fcbb30d1dc897c/0a54c6311644422180ecfde2d3c25b14.html?version=2502.VAL&state=TEST

Allow Price Change, PRICE_CHANGE_IN_SES_ALLOWED, Lean Service Price Change in PO, Service Entry Sheet, Purchase Order , KBA , MM-PUR-SVC-SES-2CL , Service Entry Sheet for Service Procurement (Public Cloud) , Problem