I have seen an error recently with the CDS API when updating existing item in an entity when you have a field in the Patch request (so far I can only figure out 'msdyn_subject'). I'm testing out to update an existing item from the out of the box Project entity (msdyn_project).
This is the error I received:
I tried to do the PATCH request via Postman, and if I removed the 'msdyn_subject' field from the request, the API works just fine. Anybody experiencing this issue?
For reference: (Highlighted below is the problematic field)
PATCH https://{ORGURL}.crm6.dynamics.com/api/data/v9.0/msdyn_projects(ab82672e-0bdd-470e-a4a6-1e9372601751)
BODY: