Conflict types of fields

[ZeN220]

For example, schema of notifications_notification_parent object refers to wall_wallpost_to_id, photos_photo, board_topic & video_video. But this objects have a field "comments", which in each of objects has a diffirent type of:

"notifications_notification_parent": {
  "type": "object",
  "allOf": [
    {
      "$ref": "../wall/objects.json#/definitions/wall_wallpost_to_id"
    },
    {
      "$ref": "../photos/objects.json#/definitions/photos_photo"
    },
    {
      "$ref": "../board/objects.json#/definitions/board_topic"
    },
    {
      "$ref": "../video/objects.json#/definitions/video_video"
    },
    {
      "$ref": "../notifications/objects.json#/definitions/notifications_notifications_comment"
    }
  ],
  "additionalProperties": false
}

wall_wallpost_to_id object:

"wall_wallpost_to_id": {
  "type": "object",
  "properties": {
    "comments": {
      "$ref": "../base/objects.json#/definitions/base_comments_info"
    }
  },
  "additionalProperties": false
}

photos_photo object:

"photos_photo": {
  "type": "object",
  "properties": {
    "comments": {
      "$ref": "../base/objects.json#/definitions/base_object_count"
    }
  },
  "additionalProperties": false
}

board_topic object:

"board_topic": {
  "type": "object",
  "properties": {
    "comments": {
      "type": "integer",
      "description": "Comments number"
    }
  },
  "additionalProperties": false
}

video_video object:

"video_video": {
  "properties": {
    "comments": {
      "type": "integer",
      "description": "Number of comments",
      "minimum": 0
    }
  }
}

This problem is also repeated with fields id, date & owner_id.

This problem observered not only in notifications_notification_parent object, but also in newsfeed_item_wallpost object with date field.