Changes to Partially update a field.

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 404

added the non-success response with the status 409

added the non-success response with the status 429

added the non-success response with the status 500

added the non-success response with the status 503

added BaseEntityModel subschema #2 to the request body allOf list

removed subschema #1 subschema #2 from the request body allOf list

api operation id Fields_Patch removed and replaced with patch-fields-id