message: make sure data should consistent for master collection with embedded entities
diff: @@ -88,6 +88,7 @@ export function getUpdatedProps(obj: any, type: EntityChange, jsonMapProp?: Arra
  continue;
  }
  unset[key] = '';
  + delete obj[key]; // make sure data should consistent for master collection with embedded entities
  u = true;
  }
  else {
  