Error: The object cannot be updated because it is read-only in Microsoft Power Apps

Exception Message: Cannot Update a Read-Only Entity
ErrorCode: -2147220946
HexErrorCode: 0x8004022e
ErrorDetails:
HttpStatusCode: 400
TraceText:
[Microsoft.Dynamics.Sales.Plugins: Microsoft.Dynamics.Sales.Plugins.PreOperationSalesOrderUpdate]
[fba59793-5468-e611-80e8-00155d2920d8: Update of Sales Order]
Entered Microsoft.Dynamics.Sales.Plugins.PreOperationSalesOrderUpdate.Execute(), Correlation Id: 9db6b43e-6e3f-466b-8170-7f34664538e1, Initiating User: f695d62d-99af-ea11-a812-000d3a795180
Exception: Microsoft.Dynamics.Solution.Common.CrmException: Cannot Update a Read-Only Entity (Fault Detail is equal to Exception details:
ErrorCode: 0x8004022E
Message: Cannot Update a Read-Only Entity
StackTrace:
at System.Environment.GetStackTrace(Exception e, Boolean needFileInfo)
at System.Environment.get_StackTrace()
at Microsoft.Dynamics.Solution.Common.CrmException.BuildOrganizationServiceFault(Exception innerException, Int32 errorCode, Int32 statusCode, String message)
at Microsoft.Dynamics.Solution.Common.CrmException..ctor(String message, Exception innerException, Int32 errorCode, Int32 statusCode, Boolean isFlowControlException, Boolean enableTrace)
at Microsoft.Dynamics.Solution.Common.CrmException..ctor(String message, Exception innerException, Int32 errorCode, Int32 statusCode, Boolean isFlowControlException)
at Microsoft.Dynamics.Solution.Common.CrmException..ctor(String message, Int32 errorCode)
at Microsoft.Crm.Sales.ObjectModel.SalesOrderService.ValidateForUpdate(Order preImage, Order salesOrder, IPluginContext context)
at Microsoft.Dynamics.Sales.Plugins.PreOperationS…)., Correlation Id: 9db6b43e-6e3f-466b-8170-7f34664538e1, Initiating User: f695d62d-99af-ea11-a812-000d3a795180
Exiting Microsoft.Dynamics.Sales.Plugins.PreOperationSalesOrderUpdate.Execute(), Correlation Id: 9db6b43e-6e3f-466b-8170-7f34664538e1, Initiating User: f695d62d-99af-ea11-a812-000d3a795180
Activity Id: 839c2e14-2084-4425-b579-cf511446902c

I tried with System Administrator role, there is no such issue, with the update using Level Up Tool.

Then, I debugged the JS, but did not see any issue logged in the console using the custom role.

Found the below article after thorough research, and understood we cannot directly update the orders without System Administrator or Integration user role (check the below article).

MSDyn365 Internals: Read-only Sales entities – Mark Carrington

So, I changed the approach to update the field value from the Custom Page with a power automate on a button click, then it worked smoothly without any issue.

Hope you got the solution to this problem.

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