How to update multiple PR line items using a standard API

[VenuAA]

Hello,

        We are using a standard PR API for creation of purchase requisition with multiple line items using AIS (Azure integration service). Now our issue is when we are trying use a patch call to update multiple line items of the PR (ex change of quantity of line item 10, 20, 30....), the 1st line is getting updated, but  when AIS is trying to update 2nd line item getting an error- "User XXX cloud connector, SBP already processing purchase Requisition XXXXX".

Is it not possible to update the multiple line items of a PR via single update patch call of the PR requisition.

Please let me know the possible way.

Link to standard API: https://api.sap.com/api/OP_PURCHASEREQUISITION_0001/overview

Regards

Venu