Property 'stageid' is of an unrecognized EdmPropertyKind. Entity new_test has duplicate navigation property names - dynamics-crm-2011

Question

I am using CRM2016
I created a test entity to replicate the issue
I did not do any customization on it. I created a new record with default fields and form. Then I tried to access the webapi for it
http://localhost/CRMDataBase/api/data/v8.0/new_test(bgcs0249-0a06-e611-941a-003002djlnc)
It worked fine and brought the record. Then I deleted the records and created a business process flow for it, with just one stage and one step
I activated it and added a new test record and tried to access the webapi url and it threw the below error
{ "error":{
"code":"","message":"Property 'stageid' is of an unrecognized EdmPropertyKind. Entity new_test has duplicate navigation property
names. All property names (Navigation and Structural property) must be
unique in an Entity ","innererror":{
"message":"Property 'stageid' is of an unrecognized EdmPropertyKind. Entity new_test has duplicate navigation property
names. All property names (Navigation and Structural property) must be
unique in an Entity
","type":"Microsoft.Crm.CrmHttpException","stacktrace":" at
Microsoft.Crm.Extensibility.OData.CrmODataEntityTypeSerializer.CreateSelectExpandNode(EntityInstanceContext
entityInstanceContext)\r\n at
System.Web.OData.Formatter.Serialization.ODataEntityTypeSerializer.WriteEntry(Object
graph, ODataWriter writer, ODataSerializerContext writeContext)\r\n
at
System.Web.OData.Formatter.Serialization.ODataFeedSerializer.WriteFeed(IEnumerable
enumerable, IEdmTypeReference feedType, ODataWriter writer,
ODataSerializerContext writeContext)\r\n at
Microsoft.Crm.Extensibility.OData.CrmODataFeedSerializer.WriteObject(Object
graph, Type type, ODataMessageWriter messageWriter,
ODataSerializerContext writeContext)\r\n at
System.Web.OData.Formatter.ODataMediaTypeFormatter.WriteToStream(Type
type, Object value, Stream writeStream, HttpContent content,
HttpContentHeaders contentHeaders)\r\n at
System.Web.OData.Formatter.ODataMediaTypeFormatter.WriteToStreamAsync(Type
type, Object value, Stream writeStream, HttpContent content,
TransportContext transportContext, CancellationToken
cancellationToken)\r\n--- End of stack trace from previous location
where exception was thrown ---\r\n at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task
task)\r\n at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task
task)\r\n at
System.Web.Http.WebHost.HttpControllerHandler.d__1b.MoveNext()","internalexception":{
"message":"Property 'stageid' is of an unrecognized EdmPropertyKind.","type":"Microsoft.OData.Core.ODataException","stacktrace":"
at
Microsoft.OData.Core.UriParser.Parsers.SelectPathSegmentTokenBinder.ConvertNonTypeTokenToSegment(PathSegmentToken
tokenIn, IEdmModel model, IEdmStructuredType edmType, ODataUriResolver
resolver)\r\n at
Microsoft.OData.Core.UriParser.Visitors.SelectPropertyVisitor.ProcessTokenAsPath(NonSystemToken
tokenIn)\r\n at
Microsoft.OData.Core.UriParser.Visitors.SelectPropertyVisitor.Visit(NonSystemToken
tokenIn)\r\n at
Microsoft.OData.Core.UriParser.Parsers.SelectBinder.Bind(SelectToken
tokenIn)\r\n at
Microsoft.OData.Core.UriParser.Parsers.SelectExpandBinder.Bind(ExpandToken
tokenIn)\r\n at
Microsoft.OData.Core.UriParser.Parsers.SelectExpandSemanticBinder.Bind(IEdmStructuredType
elementType, IEdmNavigationSource navigationSource, ExpandToken
expandToken, SelectToken selectToken, ODataUriParserConfiguration
configuration)\r\n at
Microsoft.OData.Core.UriParser.ODataQueryOptionParser.ParseSelectAndExpand()\r\n
at
Microsoft.Crm.Extensibility.OData.CrmODataEntityTypeSerializer.CreateSelectExpandNode(EntityInstanceContext
entityInstanceContext)"
}
} } }
If I delete all the records-> deactivate business process -> add new data and then check the webapi, it is working fine. But when I activate the business process and add new data I am getting the above error
P.S: I have not done any coding/customization to business process flow and the entity. But I am still getting this error
What can be done to resolve this?

Answer 1

Looks like a bug in Web API endpoint. Community forums also reference the same issue...
The Web API endpoint still has some limitations and it doesn't fully mimic the OrganizationService behavior so, which will be for the next version (9.x.x) so if you are stuck maybe try applying an update (and then use v8.1 in the url) as, or raise a MS Support case.
If you are still stuck, just try the same using OData / OrganizationService maybe.